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Why do powerful magnet demagnetization?

by:Newland     2020-04-09
Powerful magnets generally refers to the ndfeb magnet, the rare earth praseodymium and neodymium iron alloy, this material has wide application in the market at present, but the powerful magnets in use process will often encounter magnetic fade or disappear is often happens, the section explain how powerful magnet magnetization for everybody? This section about the cause of the strong magnet demagnetization for everyone. The cause of a powerful magnet demagnetization basically has the following points. 1, magnet magnet after hot pressing or demagnetization, often used glass fiber board hot-pressing, temperature above 150 ℃; 2, magnet demagnetization or demagnetization after injection molding, heat resistance is 80 ℃, ordinary magnet injection basic is in more than 12 ℃; 3, magnet materials containing impurities too much lead to weak magnetic; 4, high magnetic field environment test the magnet itself magnet force disappear or N/S pole change; After 5, oven roasted magnet demagnetization; 6, materials containing metal Lan cause magnet powder, etc. ; 7, impact to result the magnet demagnetization, such as high collision frequency, etc. ; A: why ndfeb magnets plating three layers? Next article: how to choose and ndfeb magnet?
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