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What are the main factors that affect the magnetic performance?

Ambient temperature. Since sintered NdFeB has a negative temperature coefficient (αBr<-0.13%/℃, αHcj<-0.6%/℃), the instantaneous high temperature and continuous high temperature of the use environment will produce different degrees of demagnetization on the magnet itself , Including reversible and irreversible, recoverable and unrecoverable.

environment humidity. NdFeB itself is easy to corrode and oxidize. Generally, we use surface treatment to protect permanent magnets, but it cannot fundamentally solve the impact of environmental humidity on the magnets. The drier the environment, the longer the service life of the magnet. How to measure the level of magnetic performance?

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 Product BHmax, the unit Gauss-Oersteds, is a thing that characterizes how much energy can be stored.