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The most effective solution for high temperature demagnetization of NdFeB magnets
Time:04/09/2019
A friend with a little knowledge of magnets knows that NdFeB magnets are recognized as high-performance and cost-effective magnets in the magnetic materials industry. Many high-tech fields have designated it to make all kinds of spare parts, such as defense military, electronic technology, medical equipment. , electrical machinery and other fields are involved. The more you use, the easier it is to find problems, and the magnetite demagnetization of high-temperature NdFeB magnets has attracted much attention.
 
Why is NdFeB demagnetized in high temperature environments?
NdFeB causes demagnetization in high temperature environments, which is determined by its physical structure. Generally, the reason why a magnet can generate a magnetic field is because the electrons carried by the substance itself rotate around the atom in a certain direction, thereby generating a certain magnetic field force, thereby affecting related matters in the periphery. However, the rotation of electrons around atoms in a given direction is also limited by certain temperature conditions. Different magnetic materials can withstand different temperatures. In the case of too high temperature, electrons will deviate from the original orbit and cause chaos. When the magnetic field local magnetic field is disturbed, demagnetization occurs.
 
The temperature resistance of NdFeB magnets is about two Baidu, that is, if there are more than two Baidu, demagnetization will occur. If the temperature is higher, the demagnetization phenomenon will be more serious.
 
Several effective methods for high temperature demagnetization of NdFeB magnets.
 
First, do not put the NdFeB magnet product in too high temperature, especially pay attention to its critical temperature, that is, two Baidu, timely adjust its working environment temperature, can minimize the occurrence of demagnetization.
 
Second, it is from the technology to improve the performance of products using NdFeB magnets, so that it can have a more temperature structure, not susceptible to environmental impact.
 
Third, you can also choose the high coercivity material of the same magnetic energy product. If you can't do it, you only need to sacrifice a little magnetic energy product, find a material with higher magnetic coercivity and lower coercivity. If you can't, you can choose to use samarium cobalt. Reversible demagnetization, only the choice of samarium cobalt.