The greatest "magnetic force" among permanent magnets belongs to neodymium magnets, which are based on the NdFeB (Neodymium-Iron-Boron) alloy. The magnet is intended for use in a wide variety of industries, inventions and science.
Magnets are manufactured in a wide variety of shapes - rings, prisms, balls, cubes, etc. Different size magnets makes it possible for everyone to choose exactly the right copy to perform any of their tasks. The question often arises: how are neodymium magnets made?
When producing such a structure, the manufacturer mixes various metals: neodymium, boron and iron.. In this case, a very high magnetization force is obtained, which almost does not decrease during operation.
The formula of such a magnet is Nd2Fe14B. Various modern, most often, medical devices use the qualities of the strongest magnet for their diagnostic and laboratory functions. Such a magnet is used in magnetic resonance imaging.
There are articles on the Internet on the topic: how to make a neodymium magnet at home. It should be noted right away that, of course, such a procedure at home is impossible.
Those who came up with this bike should be reminded that today such products are quite cheap. People buy them to use when lifting metal objects, for example, from the bottom of a well. Magnetic rings are used for trawling water bodies in order to detect sunken ships and other metal objects.
At the same time, few people think about how to make a neodymium magnet with their own hands, despite the fact that such products are freely sold. This magnet can be used to make reliable fasteners to which you can hang metal and non-metal objects. Such fasteners have found a place in furniture, in doors, plastic windows and in other places where a powerful adhesive force is needed, which would be provided by the use of neodymium products.
In order to understand how a neodymium magnet is made, it should be noted that this magnet is considered rare earth, since Nd is an element of the rare earth group of the periodic table. These magnets are obtained by sintering other metals with this rare metal. This is followed by the process of magnetization.
A device is used to check the magnetization teslamer or gaussmer. This is how the magnetic induction is determined and the material code is set - 38, 40, etc.
The properties and strength of magnets are affected by a high temperature: if you heat it up to 80 degrees Celsius, then the magnetic properties may disappear. Neighboring magnets, high humidity, etc. are harmful to it.
Magnets are characterized by the following properties:
- Residual induction (symbol Br is measured in Tesla)
- Coercive force (Hc is measured in Oersteds);
- Maximum product energy (BHmax is measured in Gauss-Oersteds).
Magnets, if stored carefully, can retain their properties for a very long time. This is how they differ from ordinary ferrites, which, even for no particular reason, often lose their properties. It is not recommended to handle the magnet in any way.
He is fragile and fragile. The heat from the drill can demagnetize the material.