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What factors will affect the magnet magnetic?

by:Newland     2020-05-03
1, the ambient temperature. Because of the sintered ndfeb magnet has negative temperature coefficient ( αBr< - - - - - - 0. 13% /℃αHcj< - - - - - - 0. 6%/℃) The highest temperature, so using the environment in an instant and constant highest temperature can have a different degree of demagnetization of magnet itself, including the reversible and irreversible, recoverable and unrecoverable. 2, environmental humidity. Ndfeb magnet itself is easy to corrosion, oxidation, usually we adopt the method of surface treatment to protect permanent magnets, but does not fundamentally solve the influence of environmental humidity on magnet. The dry environment, the service life of the magnet is long. How to measure the magnet of the magnetic level? There are three main parameters: 1, the remanence Br ( 剩余感应) Gauss, unit, is measure the parameters of magnetic foreign can provide strength; 2, the coercive force Hc ( 矫顽力) , the unit Oersteds, is a measure of the ability of resistance to demagnetization parameter; Gauss - 3, magnetic energy product BHmax, units Oersteds, is characterized by how much of a physical quantity can be stored energy.
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