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Demagnetization of Neodymium Pot Magnets at High Temperature and Its Effective Solutions

The neodymium pot magnet is a tetragonal crystal formed by the neodymium, iron and boron.The neodymium pot magnets are larger than the samarium cobalt magnets. The neodymium pot magnets can last for a long time at room temperature, but it is well known that it will demagnetize in case of the high temperature.

1. Why does neodymium pot magnet demagnetize in the high temperature environment

We need to be careful about the processing procedure of the neodymium pot magnet at high temperature, because the neodymium pot magnet is easy to demagnetize at high temperature. Next, we will explore the problem of the high temperature demagnetization of the neodymium pot magnet with you.Due to the high content of the neodymium iron in the neodymium pot magnets, they are also easy to oxidize, so the various coatings that can meet these conditions depend on the service environment of the neodymium pot magnets.

The reason why the neodymium pot magnet will demagnetize in the high temperature environment is determined by its own physical structure.The reason why a general magnet can produce a magnetic field is that the electrons carried by the material itself rotate around the atom in the direction of the atom, resulting in a magnetic field force, which affects the surrounding related affairs.

However, the rotation of the electrons around the atoms in a given direction is also limited by the temperature conditions, and different magnetic materials can withstand the different temperatures.In the case of too high temperature, the electrons will deviate from the original orbit, resulting in chaos. At this time, the magnetic field of the magnetic material itself will be disturbed, resulting in the demagnetization.

The temperature resistance of the strong neodymium pot magnet is about 200 ℃, that is,  the demagnetization will occur if it exceeds 200 ℃.If the temperature is higher, the demagnetization will be more serious.

2. How to avoid the high temperature demagnetization of the neodymium pot magnet

I. Do not put the neodymium pot magnet products in the environment with too high temperature, especially pay attention to its critical temperature, i.e. 200 ℃, and adjust its working environment temperature in time to minimize the demagnetization.

II. Starting from the technology, improve the performance of the neodymium pot magnet products, so that it has a structure that can adapt to various temperatures and is not easy to be affected by the environment.

III. You can also choose the high coercivity materials with the same magnetic energy product. If not, you can only sacrifice a little magnetic energy product and find the materials with higher coercivity with lower magnetic energy product. If not, you can choose to use the samarium cobalt. As for the reversible demagnetization, you can only choose the samarium cobalt.

PS: Each material has different characteristics, so it is economical to choose the appropriate one. , We should consider it carefully when designing , otherwise it will bring losses.

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