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
What are neodymium magnets used for?
Magnetic properties can be used not only in the space sector or in scientific installations, such as the hadron collider. Magnetism can be successfully used in everyday life.
Neodymium magnet 40x20 is the most common and popular. In addition, small magnets are used. Mainly for organizing easily dismantled screens in the bathroom.
Neodymium is a material that can hold magnetism for eternity
One of the main problems of almost every magnet is its demagnetization, which occurs over time. But with the invention of the neodymium magnet, this negative feature was leveled out.
The benefits of using neodymium magnets are displayed below:
- wide availability;
- a huge variety of different sizes;
- reasonable price.
The scope of application of neodymium magnets is incredibly wide. For example, magnets can even be used as ordinary toys. They can be assembled from magnets in various configurations.
Some even say that neodymium has healing properties and is able to heal the body from various kinds of problems. Although most agree that the healing properties of neodymium are exactly the same as the miraculous effect of a zirconium bracelet (absolute zero).
Neodymium magnets as a means of fraud
As mentioned above, neodymium magnets have incredible magnetic power, which scammers have decided to use to their advantage. Today, this type of magnet is used to brake various types of meters.
In most cases, a neodymium magnet is used to brake the water meter. The more magnets that are “stuck” on the device, the higher the likelihood of it stopping completely.
Needless to say, using magnets for these purposes is fraudulent. If the inspector detects the use of a magnet, at best you will have to pay a significant fine.
However, this does not stop everyone. Strong magnets continue to be used for selfish purposes with enviable consistency.
Source: http://euroelectrica.ru/dlya-chego-nuzhnyi-neodimovyie-magnityi/
Neodymium magnets - what are they and what are they for?
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The use of neodymium magnets can be varied. Many believe that they serve solely for criminal purposes. Due to their enormous magnetism, today many people use neodymium magnets to stop meters. It is hardly worth saying that such an action is an administrative offense and is guaranteed to lead to a large fine (at best).
On the website cherepovec.magnitstore.ru you can find neodymium magnets of any configuration, which can be used in completely different ways. These methods will be discussed in the publication below.
Application for holding metal objects
Do not forget that the magnetism of a neodymium magnet is directly related to its weight and dimensions. In other words, the heavier and larger the magnet, the more strongly it is attracted to the metal surface.
It should also be remembered that the force of attraction/repulsion that a magnet has can easily cause very serious injury, ranging from small bruises (when the skin is pinched between two magnets) to a powerful blow (in the case of magnetic repulsion).
In other words, when using neodymium magnets, it is extremely important to pay attention to safety precautions.
Meanwhile, the enormous magnetic force makes it possible to use very small magnets for everyday purposes. As the most common example of use in everyday life, we can cite a bar for arranging knives.
It is mounted on the wall and ordinary kitchen knives are attached to it on top. They are fixed extremely tightly.
The use of neodymium magnets in design
Of course, magnets of this kind can also be used in design. That is, where it is necessary to fix some decorative element on the surface. The advantages of using this technique are obvious:
- neodymium magnets are extremely compact;
- by and large, there is no need to hide them; they fit into any interior;
- affordability allows you to use neodymium magnets in unlimited quantities.
Even a reinforced sheet of plasterboard on which porcelain stoneware is fixed (the heaviest finishing tile in existence) can be freely held on the structure with just three medium-sized magnets.
Moreover, this sheet can be located both vertically (on the wall) and horizontally (on the ceiling).
The video will demonstrate how to create a real electric motor using a neodymium magnet, a screw and a battery:
Source: http://mrokna.ru/stroit/neodimovyie-magnityi-chto-eto-i-dlya-chego.html
Why do we need neodymium magnets | Ural Magnit
Today, neodymium magnets have gained great popularity. Magnets containing neodymium, at the moment of development of science and technology, have the highest power and have a long service life. They retain their magnetic properties for much longer than their closest analogues. A person who hears about neodymium magnets for the first time asks a natural question: why are neodymium magnets needed? In this article we will try to give a detailed answer.
Where are neodymium magnets used?
Very often these magnets are used in the production of various devices and household appliances. They can be found in the hard drive of your home computer, headphones in your smartphone and other household appliances. They are used in the manufacture of furniture - in the form of various accessories. In healthcare in diagnostic devices. In advertising and other various areas of our daily life.
According to sales statistics from our store, a neodymium magnet in the form of a disk, 50x30 mm in size, is one of the most popular neodymium magnets in this class. As for the shapes of magnets, they most often have the form of a disk or washer; neodymium magnets of other configurations are also found. For example, designers use spherical magnets for decorative purposes.
Since these magnets have a very high magnetic force, people have quite logical questions - do neodymium magnets cause harm to human health? In the article “Is a neodymium magnet dangerous for human health”, we conducted a small study on this issue and came to the conclusion that a neodymium magnet does not have any harmful effects on human health.
What not to do with neodymium magnets
Our inventive fellow citizens found another area of application for neodymium magnets; they began to use neodymium magnets as a means of fraud. As mentioned above, neodymium magnets have enormous magnetic force, which scammers have successfully turned to their advantage. You've probably heard that this type of magnet is used to brake various metering devices.
Most often, neodymium magnets are used to brake water and electricity meters. The stronger the magnets are used on the devices, the higher the likelihood of the meter completely stopping. Needless to say, the use of neodymium magnets for the described tasks violates the law and is fraud; for such acts, at best, you will have to pay an impressive fine.
However, this circumstance does not stop our inventive citizens. Powerful magnets continue to be used for selfish purposes with enviable consistency.
Source: https://magnitural.ru/neodimovye-magnity/zachem-nuzhny-neodimovye-magnity.html
How do neodymium magnets differ from ordinary ones?
Each electron carries a tiny electrical charge. Current is the movement of electrons through a conductor, like water through a pipe. Movement + charge = electromagnetic field. Please note that neodymium magnets are sold on the website ndfeb-magnit.ru, look at the range and prices.
The field of a permanent magnet is of the same nature. But nothing seems to be moving? Electrons still rush around in their orbits. True, their sizes are small to the point of unimaginability, the fields of each individually are insignificant. And since they are directed haphazardly, they mutually destroy each other.
Permanent magnets have small areas called domains. These structural units are directed in such a way that the fields of the electrons in them all add up. Only some materials can structure the fields of their domains in this way under the influence of an external magnetic field. Permanent magnets are made from them. By the way, you can buy disk magnets on the website http://ndfeb-magnit.ru/.
A little history
The legend tells of the observant shepherd Magnus, who noticed the attraction of the iron tip of a stick to a black stone. Either by name, or from the name of the area of Magnesia, where iron ore was mined and the name magnet came from. Magnetic iron ore consists of a mixture of divalent and trivalent iron oxide.
Our Earth is also a huge magnet. The first and practically only use for magnets in ancient times was to observe the interaction of the planet's field and the compass needle. An arrow floating in the water pointed to the pole. Invaluable information for sailors - there are no landmarks in the middle of the sea, no traces are visible on the water
Significant (not counting compasses) applications for magnets could not be invented before the discovery of electricity. More precisely, before the discovery of the connection between the magnetic and electromagnetic fields. And the more electrics meant to humanity, the higher the importance of magnets became.
Properties and strength of a magnet
Let's imagine a piece of conductor. Let's start an electric current. Let's turn it off. The domains are magnetized: there is no current, but there is a field. To neutralize it, you need to run the current in the opposite direction. It is by the intensity of this “neutralizing” current that the coercive force is measured in Amperes/meter - the ability of a material to retain magnetization.
If the coercive force is low, the substance is called “soft”; if it is high, the substance is called “hard”. It all depends on the application. For example, in AC motors it goes 50 times per second in one direction and 50 times in the opposite direction. Naturally, the material must be “soft”, otherwise part of the current will always be spent on overcoming the field of the material that has already become magnetized and holds a charge.
Permanent magnets are substances with a very high coercive force:
- Magnetized during manufacture, they hold a charge for years. Now they are made from steels with the addition of carbon, tungsten, cobalt, chromium and some other elements. Their coercivity is up to 6500 A/m.
- Alni, Alnisi, Alnico alloys contain aluminum. Alone, it is non-magnetic, but with the right additives it forms an alloy with a coercive force of up to 60,000 A/m. And among the newest ones - “neodymium” - they make magnets with a coercive force above 2 million A/m.
Modern materials for magnets
- Barium and strontium ferrites Ba/SrO 6 Fe2O3. Cheap and therefore very common. Brittle, medium magnetic properties.
- Neodymium Nd2Fe14B. Excellent magnetic properties, relatively inexpensive. They corrode, so the surface is usually covered with protective materials.
- Samarium-cobalt SmCo5/Sm2Co17. Excellent magnetic properties that do not disappear at temperatures up to 350 °C.
- Alnico. A group of alloys with aluminum, nickel, cobalt, iron. Withstands up to 550 °C, stable magnetic properties and durability, inexpensive.
- Magnetic plastics. Magnetic powder is hardened with plastics. This is how magnets of complex shapes with precise dimensions are obtained.
Alloys contain very different materials with different melting points. The usual method of production is sintering from a powder mixture.
Here is a video of the making process.
Neodymium magnets
The strongest magnetic properties available today. Neodymium was obtained in 1885, but in its pure form only in 1925. The point is the high similarity of the chemical properties of neodymium with praseodymium. Therefore, their mixture - didim - was long considered a single element.
It oxidizes in air, so store it in a vessel with kerosene for protection. The main reserves and the lion's share of production are in China. Now the cost has fallen; in 2014, a kilogram cost about $70. A magnet is made by sintering powders or fusing them. Composition: 2 neodymium atoms, 14 iron atoms, 1 boron atom. It is afraid of corrosion, so it is always coated with a protective compound. It is unstable to heat and loses its properties at temperatures above 80 °C.
The given composition is inaccurate; neodymium magnets differ by class. Depending on small additives and differences in production, the properties vary. Widely used in the manufacture of computer hard drives, DVD drives, speakers of various products, tomographs and a whole bunch of other devices.
Source: http://www.k-see.ru/st/chem-neodimovie-magniti-otlichayutsya-ot-obichnih/
Neodymium magnet - what is it?
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A neodymium magnet is a product made from a rare metal alloy. Thanks to this, it is possible to create very strong magnetic fields with a relatively small size of the magnet itself. The force of attraction will be hundreds to thousands of times greater than the mass of the product itself, made from an alloy of neodymium, iron and boron.
To purchase a neodymium magnet with the required attractive force, just follow this link. The virtual catalog presents a wide range of products from different manufacturers who have established themselves in the market as reliable suppliers of quality goods.
In addition, the online store presents exclusively certified products. This ensures that neodymium magnets are not susceptible to corrosion. This is achieved through treatment with zinc and nickel. The product itself will be able to retain all its properties for a 30-year period and withstand high temperature changes.
Features of magnet production
Such a metal alloy is produced by sintering powdered metal elements and neodymium in a vacuum or protective gaseous space.
It will not be possible to create such a product at home, since it is necessary to have special melting furnaces, chemical elements and reinforced electromagnets designed to magnetize the workpieces.
How to choose the right neodymium magnet?
Currently, such products are widely used in domestic and industrial conditions, in the creation of radio electronics. In addition, modern science and medicine also cannot imagine its existence without such products.
In the domestic sphere, neodymium magnets can be used to attach heavy drapes and curtains. In addition, it is possible to fix metal-containing elements in a static position without the need for fastening with screws. Depending on what object needs to be secured, you can choose a magnet with different adhesive strength from several to several hundred kilograms.
The website http://alcopribor.ru/catalog/neodimovye-magnity presents a wide selection of neodymium magnets, among which it will not be difficult to choose an option that meets all the necessary requirements and requests.
Neodymium magnets are also used in the manufacture of fuel activators, rotors in engines, brake systems, as well as in mechanical engineering, electrical engineering, and medicine. To do this, simply select a magnet with the required adhesive force. It will have the optimal shape and size.
Source: https://fainaidea.com/jeto-interesno-znat/neodimovyj-magnit-chto-eto-takoe-94121.html
