Ambient temperature. Since sintered NdFeB has a negative temperature coefficient (αBr<-0.13%/°C, αHcj<-0.6%/°C), the instantaneous maximum temperature and the continuous maximum temperature of the use environment will cause different degrees of demagnetization to the magnet itself, including Reversible and irreversible, recoverable and unrecoverable.

environment humidity. NdFeB itself is easily corroded and oxidized. Generally, we use surface treatment to protect permanent magnets, but it does not fundamentally solve the effect of ambient humidity on magnets. The dryer the environment, the longer the life of the magnet. How to measure the level of magnetic performance?

There are three main parameters: Residual Induction, unit Gauss, which is a parameter to measure the strength of the magnetic field provided by the magnet; Coercive Force, unit Oersteds, is a parameter to measure the anti-demagnetization ability; The product BHmax, unit Gauss-Oersteds, is a physical quantity that characterizes how much energy can be stored.