What are the important factors that affect the magnetic performance of the magnetizer?

① Ambient temperature. Since sintered NdFeB has a negative temperature coefficient (αBr<-0.13%/℃, αHcj<-0.6%/℃), the instantaneous temperature and continuous temperature of the application environment will demagnetize the magnet itself to varying degrees, including reversible And irreversible, recoverable and non-recoverable.

② Environmental humidity. NdFeB itself is easy to corrode and oxidize. Generally, we adopt the method of surface treatment to maintain the permanent magnet, but it cannot fundamentally deal with the influence of environmental humidity on the magnet. The drier the environment, the longer the service life of the magnet.

③How to measure the unevenness of magnetic function? There are three main parameters: Remanence Br (Residual Induction), the unit Gauss, is a parameter that measures the strength of the magnetic field that the magnet can provide to the outside; Coercive Force Hc (Coercive Force), the unit Oersteds, is a parameter that measures the ability to resist demagnetization; Magnetic energy The product BHmax, in Gauss-Oersteds, is a physical quantity that characterizes how much energy can be stored.