1. Strong magnet is called permanent magnet. According to the principle, demagnetization has nothing to do with time. There are two main factors causing demagnetization of magnet, temperature and oxidation. If the temperature is too high, it will lose magnetism if it exceeds Curie temperature by 300 ℃. If the protection is not good, it will also lose magnetism if it is oxidized, which is also the ...
Magnetic materials mainly include permanent magnets, strong magnets, special-shaped magnets, Nd-Fe-B magnets, etc., covering many high-tech fields. In the fields of rare earth permanent magnet material technology, permanent ferrite technology, amorphous soft magnetic material technology, soft ferrite technology, microwave ferrite device technology, special equipment technology for magnetic materia...
