Neodymium magnet N52 D60x40 super strong round magnet 250kg rare earth strong permanent powerful magnetic iron body
Product Description
D60 * 40 mm N52 + Maximum capacity of steel cup = 250 kg
The magnet is fragile and this product combination protects the magnet from damage and rust.
If the highest possible tension force is required, then neodymium magnets are the answer to your magnet needs
This is our real magnet
Product details:
Shape: Disc Brake
Dimensions: D60x40mm = 250 kg
Material: neodymium permanent magnets
Grade: N52 + steel bowl
Maximum operating temperature: 80 degrees Celsius/176 degrees Fahrenheit
Plating: Nickel + Copper + Nickel Three-layer plating
1. The pulling force will be maximized when pulling from the vertical direction with the surface of the magnets.
2. The traction force will depend on many factors: material material, effective contact area, surface smoothness, traction direction, temperature, material type, thickness, flatness, friction level, etc.), its quality (such as rust-free), its size (thickness plus total surface area), etc.
Note:
Material: NdFeB magnets (neodymium
About Us:
We are mainly producing mid and high-end NdFeB permanent magnets and research and development of NdFeB magnetic material .
We have been working on magnetic materials for more than 10 years . We are a professional online retailer in China.
We stock over one million magnets in various sizes. Most orders can be processed within 24-48 hours.
Customization is possible, but it will cost more for less quantity.
For any information, please contact us at any time. We will reply as soon as possible.
Thank you!
Source: https://ru.aliexpress.com/i/33015235741.html
Application of neodymium magnets
The scope of application of neodymium magnets is incredibly wide, ranging from domestic use to medicine, industry, etc. It turns out that we come across such magnets very often, it’s just that no one really thinks about the fact that the basis of the things we are used to are the unique properties of this product.
Neodymium magnets in everyday life
Neodymium magnets are considered the best clamps and fasteners. Thanks to the power of the magnetic field, they are able to play the role of a vice. In everyday life, there is often a need to glue various materials or parts together. It is enough to place them between a pair of neodymium magnets, and extremely strong fixation will be ensured. It is also important that the force exerted by the magnet does not decrease over time, therefore the stability of the fixation is ensured.
Another advantage of neodymium magnets lies in their compact size, so they can be used for gluing parts and materials with complex configurations. Such magnets are also indispensable for fastening any metal objects. For example, you can place various devices on the walls of the kitchen, fixing them with magnets. By the way, with the help of powerful neodymium magnets, you can even hang a bicycle in the garage, not to mention tools.
The easiest way to find a lost metal object (a nail, keys or a needle) is to attach a magnet to some handy object and move it under furniture or along the floor for a while. During repairs, the location of the reinforcement in the walls can be determined in the same way.
Neodymium magnets can easily find objects made of any metal in soil and sand, so they can be used in searching for various products in nature. By the way, it was from this activity that many collectors of rarities began to get involved in treasure hunting.
Summer residents have the opportunity to use a magnet to retrieve objects that have fallen into a well, water tank or pond. For a similar purpose, neodymium magnets are used to lift metal objects from the bottom of rivers or lakes.
Today, every home has a computer, and the user has information recorded on a hard drive, CD, etc. If a hard drive or mobile storage device is broken, this does not mean that someone will not be able to read information from it. Therefore, before throwing away disks, treat them with a neodymium magnet, and the data will be guaranteed to be destroyed.
Another common application is the use of neodymium magnets for recreational purposes such as performing magic tricks, assembling models, and solving puzzles. In this area, the possibilities of such magnets are almost limitless.
You can attach them to two objects and perform a trick of attracting them to each other. There are few people who are not attracted to the popular neocube puzzle. This toy consists of many magnetic balls of the same size.
The stability of the design and the ability to assemble standard and original figures from the neocube are due to the magnetic field of the neodymium magnet.
Use of neodymium magnets by motorists
Car enthusiasts today use neodymium magnets to clean oil, in which metal particles accumulate due to friction of engine parts. A magnet can be used to “catch” such particles and concentrate them in places where they can be most easily removed. For example, you can attach a high-temperature magnet to the oil pan drain plug and clean it of stuck particles as needed.
A neodymium magnet is perfect for attaching various signs and signs to the roof, hood or trunk of a car, which will not move even during high-speed traffic or strong winds. Neodymium magnets can also be used to attach any devices in the cabin. In addition, magnets can magnetize tools (for example, a screwdriver) and restore the lost characteristics of other magnets.
Application in industry and other fields
The use of neodymium magnets in industry is due to the unique properties already described above.
In the production of units and parts, these products perform the function of a vice or clamps, but they also make it possible to sort metal objects and lift fairly heavy devices and products to a considerable height.
Such supermagnets are used in the manufacture of sensors and relays, in the production of electric generators, wind turbines and hydroelectric power stations, as well as diagnostic and medical equipment.
In the agriculture and food sectors, magnets are used to remove foreign metal objects from bags of cereals , grains and other products.
In workshops and workshops where large amounts of iron shavings are generated, neodymium magnets allow you to avoid injuries and easily solve the cleaning problem. For this purpose, a magnet is placed in a bag and brought to the place where metal shavings accumulate. The shavings stick to the magnet, and when the bag is turned inside out, they remain inside.
Powerful magnets are also used in the construction industry for fastening formwork, in the manufacture of cabinet furniture, jewelry and jewelry. Applications for neodymium magnets include, but are not limited to, modern medicine and the health industry.
Finally, magnetized water has a beneficial effect on the human body, and the force field generated by the magnet can normalize blood pressure and alleviate the symptoms of arthritis.
Application areas of magnets
— Advertising and souvenir products (magnets for folders, toys, jewelry, refrigerators, mounts for advertising posters, banners, posters, gift wrapping, etc.);
— Textile products (fasteners for bags, cosmetic bags, clothes, phone cases, etc.);
— Medicine (production of MRI, surgical equipment, diagnostic equipment);
— Oil and gas industry (sealed couplings and electric motors for submersible pumps, magnetic catchers and barriers, dewaxing machines, elements of diagnostic systems);
— Electronics (video equipment, audio equipment, personal computers, household appliances for various purposes);
— Nuclear production (magnetic centrifuges);
— Purification of liquids from metal impurities and scale formation (magnetic couplings and filters);
— Magnetic separation (separation of materials in glass, food, metallurgical, chemical and other industries, as well as in medicine and recycling);
— Automotive industry (microelectric motors, electromechanical converters, sensors, locking devices);
— Manufacturing of generators, engines, including hybrid ones;
— Production of lifting devices;
— Education and science.
Source: https://krasmagnit.ru/page/primenenie-neodimovyh-magnitov
Neodymium magnets: reviews and purpose
One of the very fashionable types of treatment today is the use of magnets. Neodymium magnets, reviews of which are striking in their variety of emotional colors, are perhaps the most popular remedy, which is credited with the ability to heal a wide range of diseases. Which of the stories is true and which is speculation?
What is a neodymium magnet?
This is a rare earth element that has always been valued in medicine and technology for its very high resistance to demagnetization and the ability to strongly magnetize some materials.
Neodymium magnets have long been used to produce computer hard drives, metal detectors, and oil filters. Reviews from experts confirm their durability and ease of use. Power engineers use them to build generators.
In medicine, these magnets are used to operate machines that make MRI scans. By the way, the use of very large NMs in these devices helps:
- Achieve a uniform and uniform magnetic field without using electricity.
- Dispense with the cooling system necessary for the operation of the electromagnets.
Surgeons also use neodymium magnets. Reviews from these specialists emphasize that they make it possible to reliably clean severe wounds from lumps of iron, metal shavings, etc. Permanent magnets are used to operate tonometers and devices that make it possible to detect glaucoma in the early stages.
Compresses, rings, bandages, etc.
Recently, the range of applications of NMs has been expanding. Unique characteristics allow them to be used in microsurgery and cardiology, oncology, physiotherapy, dentistry, and orthopedics. Bandages, medicinal earrings and rings based on neodymium magnets have become popular.
Reviews from some doctors and patients say that magnetizing a sore spot can stop the growth of tumors, improve vision, and relieve pain. Based on NM, American specialists have created ultra-light pumps for blood vessels, which have already saved the lives of thousands of patients.
The tiny size of NM devices allows operations to be performed even on infants. Not very decent people also love neodymium magnets. Where is this miracle remedy used in everyday life? To stop home electricity meters, for example. But this, of course, is not its value. NM has a positive effect on biologically active points.
It normalizes blood pressure and blood circulation, helps activate the immune system, accelerates the treatment of inflammation, and serves as an excellent prevention of atherosclerosis.
How to properly use a neodymium magnet?
The price of this miracle product in online stores rarely exceeds 2-3 thousand rubles (size 70x50mm). In pharmacies you can find cheaper, although not as large and powerful specimens. A prescription is not required to purchase them, so some categories of patients try to treat themselves with them.
Is it dangerous! Without knowing the power of the magnet, you can cause very serious harm to yourself. Excitation of active points can cause an increase or critical drop in pressure, tachycardia and other abnormalities. Therefore, you can purchase magnets and use them only on the recommendation of doctors.
NM should not be used by pregnant women, people who have had a heart attack, or patients with poor blood clotting. The most effective treatment can be obtained in a physical therapy office.
Source: https://FB.ru/article/137342/neodimovyie-magnityi-otzyivyi-i-naznachenie
Difference between neodymium magnet and ordinary magnet
The main difference between neodymium magnet and ordinary magnet is that neodymium magnet contains neodymium, iron and boron as the key chemical elements, while ordinary magnet contains iron as the main chemical element.
A neodymium magnet is a type of magnet with strong magnetism made from rare earth elements such as neodymium. It is an alloy of several metals such as iron, boron, etc. Whereas, conventional magnets are ceramic magnets which contain ferrite as the main compound. It contains a high percentage of iron(III) oxide along with some other metals such as barium. These magnets are popular due to their low cost and fairly high magnetism strength.
- Overview and main differences
- What is a neodymium magnet
- What is a regular magnet
- What is the difference between a neodymium magnet and a regular magnet
- Conclusion
What is a regular magnet?
Regular magnets are magnets that we use for common purposes. In most cases we use ceramic (or ferrite) magnets. These magnets contain ferrite as the main component. Ferrite is a ceramic material. It is mainly composed of iron(III) oxide. and there are also some other metals such as barium, manganese, nickel and zinc. These components are ferromagnetic and electrically non-conductive.
Ceramic magnets
In addition, these magnets have a relatively low residual magnetic induction (magnetic field strength) and coercive force (material resistance to demagnetization). But there are two types of ferrite magnets: hard ferrites and soft ferrites depending on the coercivity (high and low respectively). The magnetic energy density is also very low. But the Curie temperature (the material at which the magnet loses its magnetism) is relatively high.
Source: https://raznisa.ru/raznica-mezhdu-neodimovym-magnitom-i-obychnym-magnitom/
Properties of neodymium magnets
We are often asked questions - “What is a neodymium magnet?”, “What is its strength?”, “How long will it retain its magnetization?”, “Why is it better than a regular ferrite magnet?” Now we will try to figure this out and answer all the questions in order.
Neodymium NdFeB magnets are the strongest permanent magnets available today.
They are made from an alloy containing the rare earth material neodymium Nd, as well as iron and boron. Neodymium magnets have very high levels of residual magnetic induction and resistance to demagnetization. According to these indicators, they are many times superior to ordinary black, ferrite magnets.
Which makes them much more attractive when used in products and equipment that require a strong magnetic field. The only serious drawback of these magnets is their rather high price. Moreover, over time, it tends to grow, since the needs of the world industry for strong magnets are also constantly growing.
Technological progress is accelerating year by year, new models of smartphones, televisions, computers, navigators and similar high-tech gadgets are constantly being released, the production of which uses rare earth metals.
The main supplier, so to speak, the leader of the global market, is the People's Republic of China, which controls up to 95% of the supply of rare earth materials, and, accordingly, their prices. Another sharp increase in prices was noted in the summer of 2017, when in 3 months the price of neodymium increased by more than 50 percent.
Technical characteristics of neodymium magnets
Magnetic characteristics are set at the magnet manufacturing stage and cannot be changed subsequently. The main parameters are residual magnetic induction and resistance to demagnetization (coercive force). Magnetic induction is measured in Tesla (Ts) and Gauss (G), 1 T = 10,000 Gauss. Neodymium magnets have a residual induction of about 1.2-1.4 T (12000-14000 Gas).
It should be taken into account that such values can only be obtained by testing magnetic material in a closed circuit. When measuring the strength of the magnetic field on the surface of a magnet, the Teslameter usually shows from 200 to 500 mT (2000-5000 Gas). In addition, the readings of the residual magnetic induction strongly depend on the shape and size of the magnet - the larger it is, the stronger its magnetic field will be.
Loss of magnetic properties over time usually does not exceed 2-3% over 10 years of operation (of course, subject to temperature conditions). A distinctive feature of neodymium magnets is their rather low operating temperature. With strong heating, demagnetization of the material begins, and the hotter it is, the faster this process occurs.
The temperature at which a material begins to lose its magnetic properties is called the “Curie point.” In this case, a so-called “phase transition” occurs—the rapid destruction of the magnetic structure of the substance. Magnets made of ordinary grades of neodymium alloy, type N38, N42, etc. can withstand heating no higher than 80 degrees Celsius.
This greatly limits their use in equipment subject to high heat - for normal operation in such conditions, additional cooling of the installation is required. There are also high-temperature grades of alloys, such as N38H (120°C), N38UH (180°C). If higher operating temperatures are required, then magnets made of Alnico material (UNDC) should be considered, which can withstand heating up to 550°C.
Neodymium magnets most often have an anti-corrosion coating, nickel or zinc, less often epoxy. Magnets can be produced without any coating at all, but since they tend to rust in a humid environment, they are in much less demand. The direction of the magnetic field can be axial (along dimension h), diametrical (along dimension D) and radial (along dimension r).
Magnetic characteristics of various neodymium alloys
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Application of neodymium magnets
Neodymium magnets are widely used in various fields of human activity. Due to their high performance indicators, they are widely used in the production of radio equipment, measuring instruments, household appliances, medical equipment, mobile phones and other high-tech gadgets. These magnets are in high demand among wind generator manufacturers.
Neodymium is also used to produce search magnets; for reference, magnetic fishing is an interesting hobby that is gaining popularity. To meet the needs of consumers, neodymium magnets are produced in a variety of shapes and sizes and are able to satisfy the most demanding demands. Magnets can be made in the form of a disk, cube, rod, cylinder, prism, bar, ring, sector or ball.
In addition to standard geometric shapes, it is possible to manufacture more complex and bizarre configurations - the properties of the material allow this.
Safety precautions for handling neodymium magnets
The main advantage of neodymium magnets is their colossal magnetic force, which also poses the greatest danger in inept or careless hands. The larger the magnet, the more harm it can cause to health. Large neodymium magnets, when colliding with each other, can seriously injure limbs caught between them at that moment.
The impact will be approximately the same as hitting a sledgehammer or large hammer on an anvil. You need to understand that magnets close with terrible force and this happens in an instant. Even a person experienced in handling magnets does not always have time to react and withdraw his hand at the right moment.
Another unpleasant feature is that if, after being hit with a hammer, a person simply gets a bruised finger, then in the case of magnets, after the blow, this finger remains clamped between them as if in a vice, and getting it out of there is quite a difficult task. If you try to simply pull your finger out of the magnets, then with a high degree of probability they will pinch off a piece of skin from the tip of your finger or tear off your nail.
To avoid such consequences, keep large neodymium magnets away from each other and from iron objects , the recommended distance is at least 1 meter. If this does happen and the hand remains pinched between the magnets, then first of all you need to insert some spacers made of non-magnetic materials - plastic or wood - between the magnets; they will prevent further closing of the magnets.
After this, you can try to pull your hand out yourself or wait for the Ministry of Emergency Situations employees to arrive. Small magnets, 20-40 mm in size, can also pose a danger and, if handled carelessly, leave bruises, cuts or hematomas on the hands. It is very important to protect children from contact with neodymium magnets. Even small magnets can pose a serious threat to a child's health.
Swallowing small magnets can lead to extremely negative consequences, in which case you should immediately call an ambulance.
Keep neodymium magnets out of the reach of children! Large neodymium magnets create a strong magnetic field around themselves; to avoid damage, keep them away from sensitive equipment - computers, external drives, watches, smartphones, pacemakers, navigation equipment, bank cards, etc. In addition, neodymium magnets are quite fragile and can crack under strong impacts, which is also unpleasant and costly in terms of money. Always use extreme caution and caution when handling powerful magnets.
All sections
Source: https://supermagnet.ru/content/info.html
What is a neodymium magnet: features and characteristics, scope of application
This is not the first year that there has been an active discussion on the Internet about neodymium magnets, their properties and use in everyday life. It is interesting to figure out how this magnet differs from a regular one and whether it actually corresponds to the qualities that are attributed to it in advertising.
What is a neodymium magnet and how does it differ from a regular one?
The main difference between neodymium alloy and other varieties is its power. A small piece containing boron, iron and neodymium molecules is capable of reliably holding a heavy load on its surface.
Unlike a simple ferrite composition, neodymium alloy has a special chemical lattice that cannot be obtained by combining any other elements. Scientists have proven that the attractive force of a permanent magnet is 18 times greater than the energy of its ferrite counterpart.
Production Features
In the production of neodymium magnets, a special technology is used, during which three substances are combined. Boron has the smallest specific gravity, and the maximum amount in the final substance is occupied by neodymium, a rare earth metal of the lanthanide group (element 60 in the periodic table). As for iron, its role in the alloy is reduced to a binding component.
In the manufacture of heavy-duty devices, a special technology is used. Unlike the production of simple products, the components are not melted, but sintered. This procedure makes the resulting substance brittle. It is in order to protect the finished product from chipping and rust that at the final stage the magnets are coated with a copper-nickel alloy.
Scope and methods of using devices in everyday life and beyond
Thanks to its special power, the invention of American scientists is increasingly displacing ferroalloys that are familiar to many from the market every day.
Heavy-duty lumps of complex composition are in demand in many areas, in particular, they are used for:
- production of computer equipment for household, industrial and medical purposes;
- making toys;
- cleaning industrial premises from metal shavings;
- production of household appliances.
The attractive force of the alloy allows you to search and lift metal objects from deep holes and hard-to-reach places. Thanks to the high power of the magnet, a small piece of combined metal can be easily moved to remote corners and at the same time collect the maximum number of small objects that could hardly be combined with ordinary ferrite.
In everyday life, neodymium magnets are used in the most unexpected places, for example, in glass washing devices and in household plots. In addition, powerful devices magnetize metal strips for attaching kitchen utensils, shelves and stands.
Car enthusiasts use “supermetal” to remove dents on car bodies.
In folk medicine, the super-powerful alloy is used to make medicinal jewelry that can normalize blood pressure and change a person’s aura.
Types and differences of such magnets
The main differences between neodymium magnets and ferrite products are:
- increased force of attraction;
- resistance to demagnetization;
- multipolarity.
In addition, unlike ferrite ones, heavy-duty lumps have a metallic sheen. Depending on the needs, products can take the form of plates (with or without holes), small cylinders or cones, cubes and balls of various sizes.
Advantages and disadvantages
The advantage of “supermetallic” lumps is their small size and high power. Rare earth metal products are shock resistant and last much longer than ferrite products.
As for the disadvantages, it should be said that the magnet, the size of a child’s palm, has a very noticeable weight. In addition, it is important to say that heavy duty alloy products have a high cost.
Also, the special coating layer should be protected, and that is why it is strictly forbidden to saw, drill or otherwise destroy the protective film yourself!
Thanks to the discovery of scientists, which occurred back in 1982, the life of mankind has changed for the better.
Source: https://VGrafike.ru/neodimovyj-magnit/
Neodymium magnets. Device and application. Kinds
Almost everyone is familiar with a magnet, because they often played with it in childhood or used it at school to attach thematic materials to the board. Today, magnets are used almost everywhere; they are an essential component for various electronic devices, engines, electric generators, and transformers. Very often, magnets are used to create clips, holders, souvenirs and toys.
The most powerful are neodymium magnets, which are made of a special alloy whose structure includes boron, iron and neodymium. It is these elements that determine their advantages and disadvantages in comparison with magnets made of other materials. It is neodymium magnets that today are universally replacing standard ferrite magnets, finding increasing use.
Neodymium magnets are extremely powerful magnets that are made from rare earth metals. Also known as Neo magnet, NIB or NdFeB. In most cases it is an alloy of neodymium, iron and boron, which forms Nd2Fe14B tetragonal crystal structure.
Neodymium magnets:
- They are distinguished by high resistance to demagnetization.
- They are distinguished by high power of attraction.
- They have a metallic appearance.
- They are extremely in demand; they are used in various fields of electronics, industry, medicine and in everyday life.
The first countries to master the production of neodymium magnets were Japan and the USA.
It was the actively developing potential of these countries that stimulated the emergence of new technologies for creating permanent magnets. The neodymium magnet was first developed by General Motors together with Sumitomo Special Metals in 1982. Currently, these are the strongest permanent magnets from a whole list of commercially available ones.
The magnets have a magnetic energy value that is more than 18 times that of conventional magnets.
The composition of the new magnet was as follows:
- Bor.
- Iron.
- The metal of the lanthanide group is neodymium.
The last element in the new alloy is a rare-earth element; it functions as the main element in the alloy. Boron is present in the alloy in negligible quantities, while iron is a binding element.
Thanks to this composition, magnets have incredibly high adhesive force. Ferrite magnets simply cannot compare with them in this indicator. For example, if you connect two powerful ferrite rings together, then by applying a certain force, you can use your hands to separate them. This simply cannot be done with neodymium magnets. It will be impossible to separate two neodymium magnets connected to each other with bare hands without the use of tools.
The price of the first neodymium magnets, which appeared on the market in the mid-90s of the last century, was quite high. Currently, their cost has decreased slightly, but it still remains high. This is explained by the relatively high rarity of neodymium, including the patent struggle between different manufacturers and developers of magnets.
There are a wide variety of brands and shapes of neodymium magnets. The varied shapes of neodymium magnets are due to their different purposes. So they can have the shape of cones, cylinders, rings, spheres, balls, rectangles, disks and the like. Using the ingredients of neodymium magnets, plastic materials that have magnetic properties are also created. For example, this is magnetic vinyl.
Magnets can be classified according to:
- Magnetic energy.
- Operating temperature range.
- Dimensions.
- Grip strength.
Depending on the brand, magnets differ in operating temperature ranges:
- Brand N (Normal) - up to 80 C, that is, at normal temperatures.
- M (Medium) - up to 100 C, that is, at elevated temperatures.
- H (High) – up to 120 C, that is, at high temperatures.
- SH (Super High) - up to 150 C.
- UH (Ultra High) - up to 180 C.
- EH (Extra High) - up to 200 C.
The numbers that are indicated in the magnet class designation: 40UH, 38SH, 33M, N30 and so on, indicate magnetic energy, it is measured in kJ per cubic meter. This criterion is responsible for the power, that is, the “pull force” that is required to be applied to the magnet in order to lift it from the surface. The higher the magnet designation, the higher the pull-out force will be.
At the same time, the “pull-off force” will also depend on the weight and size of the magnet. For example, a 2520 mm magnet will be an order of magnitude easier to tear off, for example, from a steel sheet than a magnet with an area of 405 mm.
Magnets are also differentiated into classes based on the magnitude of their magnetic moment per unit of volume. Classes of neodymium magnets:
- N35-N52;
- N33M-N48M;
- N30H-N45H;
- N30SH-N42SH;
- N30UH-N35UH;
- N28EH-N35EH.
When using neodymium magnets, their features should be taken into account
- The service life of neodymium magnets is at least 30 years; if properly used and stored, it can be an order of magnitude longer. But in some conditions they can be easily damaged and damaged beyond repair. Neodymium magnets are not flexible at all. They can break under a certain load and even crack, including losing their properties.
- Dropping or striking a magnet may cause magnet particles to break off, which may result in reduced adhesion properties. In addition, a strong enough impact can lead to loss of magnet properties. Therefore, dropping neodymium magnets should be avoided, including where parts and components may hit each other or fall.
- The magnetic properties of a magnet when exposed to high temperatures are lost irrevocably. Depending on the current brand of magnet, the heating limit can be in the range of 80-250 degrees Celsius. If heated above the standard temperature, the magnet loses all its properties. Self-demagnetization of neodymium magnets is about 1% over 10 years. This figure is quite high.
- Machining a neodymium magnet is almost impossible. When creating serial samples of magnets, after purchasing them for any purpose, it will be almost impossible to give the magnet any other shape. This is due to the fact that drilling the alloy, cutting with a cutting tool or grinding can cause the alloy to ignite. Including the high temperature that will be generated during friction, will cause a harmful effect on the magnet itself, as well as its properties.
Neodymium magnets are quite widely used in industry; they are used in conducting various experiments and experiments in the field of electrical engineering and physics
- Filters are equipped with powerful magnets that capture small metal particles in liquids or gases.
- Neodymium alloy magnets are also used in the production of souvenirs and toys.
- Magnets, due to their high adhesive force, are used to search for metal objects that lie underground. Today they are actively used by search engines involved in the restoration of wartime equipment.
- Neodymium alloys are used to create magnetic fasteners, which are used to secure various objects.
- For connecting parts of metal structures: strong, but easily separated if necessary.
- For fastening blinds, curtains and other elements associated with windows.
- Creation of levitating interior items and furniture. Recently, many designers, and even ordinary creative people, have been using neodymium magnets to make their tables, stands, trays, and beds truly floating.
- Creation of free energy generators, Tesla generators, magnetic valves, Searle generators, magnetic tunnels and Hall sensors. High-grade magnets are used in the Large Hadron Collider.
- Magnets are widely used in medicine, for example, in magnetic resonance imaging machines, and also to relieve arthritis pain.
- Neodymium magnets can be widely used in everyday life, from plumbing to attaching photographs or a calendar to the refrigerator.
- Magnets are used in the creation of computer hard drives.
- Leveling out small scratches and dents on musical instruments and parts. It is enough just to attach a powerful neodymium magnet to one side of the part, as well as a large steel ball to the other.
- Cleaning technical fluids and motor oils of a car from foreign metal particles and impurities leading to engine wear.
- Magnetization of water. A number of doctors recommend drinking water that has been treated with a magnetic field in order to increase immunity and improve well-being.
- Magnets are used to create lightweight, compact, but very powerful electric current generators, for example, wind turbines , hydroelectric power plants, and other alternative energy facilities.
The advantages of neodymium magnets include:
- The attractive power is tens of times greater than the power of a conventional magnet.
- They are in demand from large manufacturers, but they can also be purchased for household use. Magnets are sold in specialty stores and regular online stores.
- Due to the fairly high power, demagnetization does not occur for a long time. Over 10 years, only 1% demagnetization occurs.
- Possibility of wide application in various industries.
- Light weight and compact dimensions compared to other magnets with the same adhesion force.
The disadvantages of neodymium magnets include:
- Neodymium magnets can be hazardous to health and surrounding products in inexperienced and inept hands. They can damage the upholstery of metal furniture, cars and even walls. They should not be given to children.
- The magnets are very difficult to disengage, which in certain cases is a big drawback.
- Negative impact on the operation of electronics.
- Neodymium magnets cannot withstand strong drops or impacts.
- They lose their properties at relatively high temperatures.
Related topics:
Source: https://electrosam.ru/glavnaja/slabotochnye-seti/oborudovanie/neodimovye-magnity/
Neodymium magnets: what are they?
December 14, 2019
Neodymium magnets are characterized by very high power and resistance to demagnetization. They appeared relatively recently, a little less than 40 years ago. They quickly gained popularity due to their high magnetic induction. Even magnets of small mass can provide very high adhesive force. For example, a neodymium magnet in the form of a cube with an edge of 10 centimeters will provide an adhesion force of 4.5-5 kg, which cannot be compared with traditional magnets.
In addition, they have other properties that are extremely useful. They lose from 0.1 to 2% of magnetization in 10 years (during this time any ordinary magnet will demagnetize almost completely). That is, under ideal conditions, neodymium magnets can last several thousand years. But this is in theory, in practice the real terms are up to a hundred years or more. But this is still a lot when compared with conventional magnets.
They also have certain disadvantages that make their use somewhat limited. Firstly, they are susceptible to corrosion, to prevent which they are coated with nickel (but not all). They cannot be heated, and the maximum permissible temperature depends on the brand:
- EH – up to 200 degrees;
- M – up to 100;
- N – up to 80.
They are fragile, you should avoid any mechanical impacts, let alone falls from a height. They can also negatively affect the performance of electronics. Although, because of this property, they are used for not entirely legal purposes, which we will write about below.
It is worth noting that the disadvantages include their price, which is very high (compared to conventional magnets). They especially began to rise in price recently, after China introduced export quotas for rare earth metals. China contains more than 50% of neodymium deposits, which is the main component of magnets. Obviously, this trend will continue in the future, so neodymium magnets will become more expensive.
They are produced in various shapes and sizes: disks, cubes, rods, balls and others. Some products are capable of lifting masses weighing more than one ton.
Neodymium magnet for stopping meters: which one is needed
Many common models of water and electricity meters have rotating metal parts inside, which can be influenced by the magnetic field of a neodymium magnet in such a way as to slow down their operation and reduce the final readings.
Before recommending magnet models for stopping meters, let us remind you that such influence on the meter is illegal and, if detected, is punishable by a fine and recalculation of consumption for the period of operation of the magnet. With a high degree of probability, you will simply lose a lot of money.
However, we will consider the theory (this can also be used for other purposes that do not involve deception or harm).
The main characteristic of a magnet is its power, which depends on the size of the product. It is important not only to choose a sufficiently powerful magnet, but also not to buy one that is too large so as not to affect your neighbors’ meters. One of the recommended brands of neodymium magnets is Rexant.
What kind of neodymium magnet is needed to stop water meters:
- For the simplest models: Metron, Neva, Gerrida, a 45x15 mm magnet is suitable;
- For Novator, Minol, Betar, Norma, etc. you need a larger magnet - 50x20 or 50x30 mm;
- Valtec, Itelma, Meteor and the like - magnet 60x30 mm;
- Elster - magnet 70x40 mm;
- For heat and water meters - magnet 70x50 mm
What kind of neodymium magnet is needed to stop electricity meters:
An electric automatic meter cannot be stopped in this way, but for mechanical models the recommendations are as follows:
- Mercury 201-203, Mikron SEO, Neva, SKAT 101 - magnet 50x20 mm;
- Meridian, Energomera - magnet 45x30 mm;
- Mercury 230-231, Micron PSCH, NIK, STE - magnet 50x30 mm;
- SKAT 301 - magnet 60x30;
- CA4, SO, SOLO, ESR powerful magnets 70x30 and 70x50 mm are suitable.
Why are neodymium magnets needed?
Magnets made from an alloy of rare earth neodymium, boron and iron are widely used both in industry and in everyday life.
Due to the fact that neodymium magnets create a more powerful field than conventional ferrite ones and are also more resistant to demagnetization, they are used for the production of generators, electronics (headphones, computer hard drives), magnetic resonance imaging scanners and much other equipment.
Quite often, ordinary people ask why neodymium magnets are needed in everyday life. And it turns out that in this area there are a lot of ways to use them.
- search and lifting of metal objects: a key at home or on a property is lost, or a bucket has fallen into a well - a neodymium magnet will solve these problems;
- fixing objects when gluing: 2 magnets are attached from different sides and provide uniform and constant compression;
- fastening metal objects in the kitchen or garage;
- securing signs, plates, navigator or radio remote control and other similar items in cars;
- destruction of data on magnetic media: if you need to securely delete information from old cassettes or floppy disks;
- from a couple of magnets you can make excellent latches for furniture and save yourself from the need to screw in screws;
- such magnets will simplify the collection of metal debris (for example, shavings);
- This is an excellent material for visually explaining to children the effects of a magnetic field.
In addition, you can find many reviews online about the use of neodymium magnets to magnetize water (which some claim improves its properties), condition fuel (and save it), and even accelerate the maturation of wines and liqueurs.
Whether to believe that neodymium magnets are needed for these purposes is a personal choice. These facts have not been scientifically confirmed, and our people believe in many things that have no justification.
Therefore, in our opinion, there is no need to buy expensive neodymium magnets and use them for other purposes. You'll just be wasting your money.
Source: https://tze1.ru/articles/detail/neodimovye-magnity-chto-eto-takoe/
Neodymium magnets, what are they and what are they for?
Many people ask about neodymium magnets, what they are and what they are needed for. Well, check out the review, here you will find out where magnets are used, how they appeared and where it is better to buy. Hurry up and move on!
Each of us knows what a magnet is. But if you ask about neodymium magnets, what they are and what they are for, not everything will be answered. If you are not yet familiar with this “miracle beast,” then read on. Just imagine, the first such magnet was invented in 1983 by accident and in 3 laboratories at once!
If you think about it, this is more like a myth, but the surviving documentation confirms the fact that the neo-magnet recipe was created in three points on the planet at once. Unimaginable!
General Motors - an American company, Sumitomo Corporation - a Japanese trading company and the Chinese Academy of Sciences were able to make a breakthrough in the magnetic industry.
What are neodymium magnets and what are they for?
Such products have a powerful magnetic field. The composition is very interesting, there are only three components: boron, iron and neodymium. The latter, in turn, is a rare earth element. More precisely, it belongs to the rare earth class, but there is quite a lot of it on planet Earth.
Do you know how to choose a neodymium magnet for a water meter? No?! Rather, go to http://inforemontik.ru/kak-podobrat-neodimovyiy-magnit-dlya-schetchika-vodyi/ where complete instructions await you.
These magnets are known for their attractive force and good resistance to demagnetization. In appearance they resemble an ordinary magnet, only with a characteristic metallic sheen (on a fault it is no different from the usual version of the magnet).
The production of neodymium magnets is a separate topic, but we will briefly touch on it. There are two methods: baking and injection.
For baking, a ready-made mixture is used, it is shaped and sent to an oven heated to 1200 degrees, or it is injected into molten polymer, and then poured into molds.
Pricing is the main problem when buying and selling this product. According to statistics, 95% of neodymium is mined in China and additional export quotas limit wasteful treatment of it.
Because of this, the first jumps in value began to show themselves back in 2009, then in 2011. the cost of neodymium has increased 5 times. And 2017 raised the price by another 1.5 times.
Where is the best place to buy?
Buying neodymium magnets is not an easy task. There are a large number of fakes on the Russian market. Why not order from China?
Source: http://yerkramas.org/article/149704/neodimovye-magnity-chto-eto-i-dlya-chego-nuzhno
Powerful magnets
> Theory > Powerful magnets
Even in ancient China, attention was paid to the attractive properties of some metals. This physical phenomenon is called magnetism, and materials that have this ability are called magnets.
Now this property is actively used in radio electronics and industry, and especially powerful magnets are used, among other things, for lifting and transporting large volumes of metal. The properties of these materials are also used in everyday life - many people know magnetic cards and letters for teaching children.
What kind of magnets there are, where they are used, what neodymium is, this text will tell you about it.
Types of magnets
In the modern world, they are classified into three main categories based on the type of magnetic field they create:
- permanent, consisting of a natural material that has these physical properties, for example, neodymium;
- temporary, possessing these properties while in the field of action of a magnetic field;
- Electromagnets are coils of wire on a core that create an electromagnetic field when energy passes through the conductor.
In turn, the most common permanent magnets are divided into five main classes, according to their chemical composition:
- ferromagnets based on iron and its alloys with barium and strontium;
- neodymium magnets containing the rare earth metal neodymium in an alloy with iron and boron (Nd-Fe-B, NdFeB, NIB);
- samarium-cobalt alloys, which have magnetic characteristics comparable to neodymium, but at the same time a wider temperature range of application (SmCo);
- Alnico alloy, also known as UNDC, this alloy is characterized by high corrosion resistance and a high temperature limit;
- magnetoplasts, which are a mixture of a magnetic alloy with a binder, this allows you to create products of various shapes and sizes.
Ferrites
Alloys of magnetic metals are brittle and fairly cheap products with average qualities. It is usually an alloy of iron oxide with strontium and barium ferrites. The temperature range for stable operation of the magnet is not higher than 250-270°C. Specifications:
- coercive force – about 200 kA/m;
- residual induction – up to 0.4 Tesla;
- average service life is 20-30 years.
What are neodymium magnets
These are the most powerful of the permanent ones, but at the same time they are quite fragile and not resistant to corrosion; these alloys are based on the rare earth mineral - neodymium. This is the strongest permanent magnet.
Characteristics:
- coercive force – about 1000 kA/m;
- residual induction – up to 1.1 Tesla;
- average service life is up to 50 years.
Their use is limited only by the low limit of the temperature range; for the most heat-resistant brands of neodymium magnet it is 140°C, while less resistant ones are destroyed at temperatures above 80 degrees.
Samarium-cobalt alloys
Possessing high technical characteristics, but at the same time very expensive alloys.
Characteristics:
- coercive force – about 700 kA/m;
- residual induction – up to 0.8-1.0 Tesla;
- average service life is 15-20 years.
They are used for difficult working conditions: high temperatures, aggressive environments and heavy loads. Due to their relatively high cost, their use is somewhat limited.
Alnico
A powder alloy of cobalt (37-40%) with the addition of aluminum and nickel also has good performance characteristics, in addition to the ability to retain its magnetic properties at temperatures up to 550°C. Their technical characteristics are lower than those of ferromagnetic alloys and are:
- coercive force – about 50 kA/m;
- residual induction – up to 0.7 Tesla;
- average service life is 10-20 years.
But, despite this, it is this alloy that is most interesting for use in the scientific field. In addition, the addition of titanium and niobium to the alloy helps to increase the coercive force of the alloy to 145-150 kA/m.
Magnetic plastics
They are used mainly in everyday life for making magnetic cards, calendars and other small things; the characteristics of the magnetic field decrease slightly due to the lower concentration of the magnetic composition.
These are the main types of permanent magnets. The principle of operation and application of an electromagnet differs somewhat from such alloys.
Interesting. Neodymium magnets are used almost everywhere, including in design to create floating structures, and in culture for the same purposes.
Electromagnet and demagnetizer
If an electromagnet creates a field when passing through the turns of the winding of electricity, then the demagnetizer, on the contrary, removes the residual magnetic field. This effect can be used for various purposes.
For example, what can be done with a demagnetizer? Previously, the demagnetizer was used to demagnetize the playback heads of tape recorders, television picture tubes and perform other similar functions.
Today it is often used for somewhat illegal purposes, to demagnetize meters after using magnets on them. In addition, this device can and should be used to remove residual magnetic fields from instruments.
The demagnetizer usually consists of an ordinary coil, in other words, in terms of design, this device completely replicates an electromagnet. An alternating voltage is applied to the coil, after which the device from which we remove the residual field is removed from the demagnetizer's coverage area, after which it turns off
Important! Using a magnet to “twist” the meter is illegal and will result in a fine. Improper use of the demagnetizer can lead to complete demagnetization of the device and its failure.
Making your own magnet
To do this, it is enough to find a metal bar made of steel or other ferroalloy; you can use the composite core of the transformer, and then make a winding. Wind several turns of copper winding wire around the core. For safety, it is worth including a fuse in the circuit. How to make a powerful magnet? To do this, you need to increase the current strength in the winding; the higher it is, the greater the magnetic force of the device.
When the device is connected to the network and electricity is supplied to the winding, the device will attract metal, that is, in fact, it is a real electromagnet, albeit of a somewhat simplified design.
In the modern world, magnetic field energy is widely used. Both in industry, radio electronics and electrical engineering, and for domestic purposes. Dozens of different devices have been created to generate a magnetic field, and the natural properties of minerals are also used.
The most widely used permanent magnet is the neodymium magnet. Its use and widespread use is due to both its cost and excellent technical characteristics. Its disadvantages are: a tendency to corrosion and fear of high temperatures. For this reason, in difficult operating conditions, other types are used that do not have these limitations.
Magnetic field energy density
Source: https://jelectro.ru/teoriya/moshhnye-magnity.html
Neodymium magnet – what is it useful for and how to use it for health?
There are many metals with magnetic properties that are used in industry. But the neodymium magnet is recognized as the most powerful today - it is an alloy of rare earth metals: neodymium, boron and iron. The magnet has high power, is resistant to demagnetization, and due to its availability, is used for medical and industrial purposes.
What are magnets in physiotherapy?
Alternative medicine offers a group of techniques for influencing the body using magnetic fields. This intervention is called magnetotherapy. The procedure has a therapeutic and preventive effect. Often, neodymium magnet disks are used to treat osteochondrosis, joints and fractures of varying severity. The method is used in gynecology to dull pain and resolve tumors.
Like any other therapy, there are a number of contraindications:
- blood clotting disorder;
- thrombosis, during exacerbation;
- disturbances in the functioning of the heart muscle;
- presence of a pacemaker;
- mental illness;
- oncology;
- pregnancy;
- younger children's age.
Neodymium magnet - what is the difference from a regular one?
Neodymium magnets are used everywhere for treatment and have a number of features. The first thing that distinguishes this type from the usual one is its adhesion strength. It is much higher because the characteristics of such an alloy are many times higher than those of conventional magnets.
To make sure that you have a neodymium magnet in front of you, you need to try to unhook it from the iron surface. Ordinary, will easily succumb to pressure and will be in your hands in a second. Neodymium, on the other hand, will hold tightly to the surface and will require effort to remove it.
The main differences between a neodymium magnet and a conventional one:
- Life time. Ordinary representatives last for about 10 years, neodymium ones last forever.
- Form. Strong magnets are available in various forms, ordinary ones - only in the shape of a horseshoe.
- Price. The cost of a regular magnet is several times lower than its “eternal” counterpart.
Magnets for health - benefits and harm
Magnets, the benefits and harms of which have been proven, should be used for treatment only as indicated by doctors. There are many magnetic devices, each of which has a positive or negative effect on the body.
The use of magnetic therapy helps maintain good health and tone of the body, but only when there are no individual contraindications. Before starting treatment, it is important to pass all the necessary tests and consult with your doctor.
Home treatment magnets can be life-threatening.
A neodymium magnet, the benefits of which are undeniable and proven, has the following healing properties:
- increases blood flow due to the supply of more oxygen;
- changes the speed of movement of calcium ions in the human body, which allows the use of magnets for the treatment of arthritis;
- changes the pH (acid-base) balance of body fluids;
- regulates the production of endocrine hormones;
- changes for the better enzyme activity and the speed of biological processes;
- changes blood viscosity.
Neodymium magnet - harm
Agreeing to magnetotherapy, many patients wonder whether a neodymium magnet is harmful to health.
The use of this type is still being studied to this day, but we can say for sure that when used correctly and safety precautions are followed, magnets do not harm the human body. Only alternating magnetic fields can have a harmful effect.
Therefore, there are exclusion zones around powerful power lines, which are dangerous to stay in for a long time. Neodymium magnets can only harm people with pacemakers.
Neodymium magnet – application in medicine
Only a trained specialist knows how to use a neodymium magnet correctly. This alloy is used in many areas of industry, mechanical engineering, agriculture and medicine. Neodymium magnets are an integral part of many devices for diagnosing diseases: tomographs, X-ray machines and other important devices.
Among other things, magnets are used for:
- manufacturing of insoles;
- in physiotherapy (by applying to painful points);
- production of magnetic belts.
Magnets for treating joints at home can be used by applying an alloy to sore joints. But self-medication is dangerous, so it would be more advisable to first consult with your doctor and rule out diseases for which the use of magnets is prohibited.
Magnetic therapy is aimed at:
- reduction of pain syndrome;
- relieving inflammation;
- improving the patient's general health.
Source: https://womanadvice.ru/neodimovyy-magnit-chem-polezen-i-kak-primenyat-ego-dlya-zdorovya
What are neodymium magnets used for?
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In principle, there are no more effective options than neodymium magnets. No ferrites can even come close in terms of magnetic characteristics. Just think, a 5-ruble coin, which is made of a neodymium magnet, can hold almost 9 kg of weight!
Where are neodymium magnets used?
Below are the most notable industries:
- electronics;
- toys;
- equipment (wind generators);
- everyday life
Neodymium magnets should be used with extreme caution in everyday life. The fact is that they have an incredible power of attraction. If you attach a magnet to a metal surface, you will hardly be able to even move it, let alone remove it.
Meanwhile, neodymium magnets are actively used in interior design. For example, in the bathroom there are a large number of communications (pipes) that need to be hidden to ensure the attractiveness of the room.
This can be done using plasterboard niches. But any plumber will confirm that bricking even into drywall is strictly prohibited by the rules.
However, a niche can always have a hatch that can be completely removed. This hatch is held in place by neodymium magnets (small in size).
Neodymium magnets in the form of a toy
You can find information online that says neodymium is an unusual metal that can heal and protect. Needless to say that this is just another nonsense of marketers (we all remember the zirconium bracelets that Buba Kikabidze tried to sell to us)?
However, neodymium magnets cannot be faulted for their beauty. It is a gray metal that can have a bright shine and can really be used to create attractive jewelry.
In addition, neodymium has recently begun to be used in the toy industry. Naturally, small balls are also used there, since the larger the dimensions of the magnet, the greater magnetism it has.
There should be no risk of injury. Meanwhile, even if magnets with two coins are placed above and under your hand, it is quite likely to get injured (bruises will form where the magnets touch).
The video will demonstrate various practical applications of neodymium magnets:
Source: http://glavspec.ru/dlya-chego-nuzhnyi-neodimovyie-magnityi.html
What is a neodymium magnet?
Neodymium is the most powerful permanent magnetic material currently known to scientists. It's also very affordable, making it suitable for a variety of uses.
Rare earth magnets
The chemical composition of a neodymium magnet: Nd2Fe14B, in other words, two neodymium atoms, 14 iron atoms, and one boron atom. Therefore, such magnets are sometimes called “neodymium-iron-boron”.
These are rare earth magnets which, unlike conventional ferrite and ceramic magnets, contain atoms from the lanthanides or actinides of the periodic table. Magnets made from neodymium are the most powerful rare earth magnets.
Their strength is often given in Gauss (MegaGauss-Oersted, magnetic energy), and depending on the form and class can reach 13,500 Gauss or more, although 2,000 Gauss is common. For comparison, refrigerator magnets produce approximately 50 Gauss.
Advantages of neodymium magnets
The main advantage of neodymium magnets is their strength : for example, a magnet the size of a 5-ruble coin (25 mm in diameter and 5 mm in thickness) can withstand a weight of almost 9 kg! Two magnets connected to each other at the wrong angle can injure the skin to the point of bruising. Large magnets (for example, 50*30 mm) are extremely dangerous, so precautions must be taken when working with them. But if precautions are taken, neodymium magnets can be used in entertainment and even educational projects.
The second, but no less important, advantage of neodymium magnets is their service life . And although the technology for producing neodymium magnets is only 30 years old, we can already say that neodymium magnets lose only about 1% of their magnetic energy over 100 years! For comparison, ordinary ferrite magnets last no more than 10 years, after which they become just a piece of iron.
Have you ever wondered why ferrite magnets are most often made in the shape of a horseshoe, with one leg painted red and the other blue? The answer is simple: manufacturers tried to short-circuit the magnetic field lines of ferrite magnets to increase their lifespan. Neodymium magnets do not require this, so they can be made into almost any shape, and can also be made “multipolar”, i.e.
having several poles on the surface.
Magnetic phenomena
In our online store you can find film for visualizing magnetic field lines in a physical environment. Carefully placed neodymium magnets can promote diamagnetic levitation, a peculiar phenomenon that can lift small objects into the air without making contact with it.
If you try to drag a magnet across a non-magnetic surface (aluminum, copper), you will feel the force of “magnetic disturbance” or simply the resistance of eddy currents that arise when the magnet moves over a non-magnetic surface.
Try to repeat these experiments with our magnets, and you will not regret it!
It’s not for nothing that they say that magnetism is the most beautiful phenomenon of physics that we ever encounter!
Source: https://magnit96.com/blog/article/chto_takoe_neodimovyj_magnit/
