Iron boron, also known as NdFeb magnet, is a tetragonal crystal system formed by neodymium, iron and boron.
Ndfeb can be maintained for a long time at room temperature, but it is well known that it will be demagnetized at high temperature. From the combination of cost and performance of NdFeb magnet, the use of traditional magnets and the creation of new product applications make their popular choice. In the case of a sharp increase in the existing strength, the use of a smaller magnet is allowed to benefit most of the design.
The processing procedure of NdFeb magnet at high temperature needs to be careful, because NdFeb magnet is easy to demagnetize at high temperature. Next we will explore the problem of high temperature demagnetization of NdFeb magnets with you. Due to the high content of neodymium iron in Ndfeb magnets, they are also easy to oxidize, so all kinds of coatings that meet these conditions depend on the operating environment of NdFeb magnets.
The reason why Ndfeb can produce demagnetization phenomenon in high temperature environment is determined by its own physical structure. General magnets can produce a magnetic field, because the material itself carries electrons around atoms in the direction of rotation, resulting in magnetic force, and then affect the surrounding affairs.
But electrons around atoms in accordance with the given direction of rotation is also limited by temperature conditions, different magnetic materials can withstand the temperature is also different, in the case of too high temperature, electrons will deviate from the original track, causing chaos, at this time the magnetic field of the local material will be disrupted, resulting in demagnetization phenomenon.
And the temperature resistance of the strong ndfeb magnet is about two hundred degrees, that is, more than two hundred degrees, there will be demagnetization phenomenon, if the temperature is higher, the demagnetization phenomenon is more serious.
Several solutions to high temperature demagnetization of NdFeb magnet
1. Do not put the NdFeb magnet product in too high temperature, especially pay attention to its critical temperature, that is, two hundred degrees, timely adjust its working environment temperature, can minimize the occurrence of demagnetization phenomenon.
2. Is to start from the technology, improve the performance of the products using iron and boron magnets, so that it can have a more temperature structure, not easy to be affected by the environment.
3. High coercivity materials with the same magnetic energy product can also be selected. If not, you have to sacrifice a little magnetic energy product and find a material with a lower magnetic energy product and higher coercivity. If not, you can choose to use samarium cobalt. For reversible demagnetization, only samarium cobalt is available.
