Which categories can the material of composite permanent magnets be divided into?

　　The first category of the material of composite permanent magnets is alloy permanent magnet materials, including rare earth magnets, NdFeB, SmCo, AlNiCo. The second major category is ferrite permanent magnetic materials ( Ferrite ).

　　According to the production process, it can be divided into sintered ferrite, bonded ferrite, injection molding ferrite, and the three process based on magnetic crystal orientation are different, it also can be divided into the isotropic and anisotropic magnet.

　　These are currently main permanent magnetic materials on the market, and some because of the production process or cost reasons, they can not be applied widely and eliminated, such as Cu-Ni-Fe ( copper nickel ), Fe-Co-Mo ( iron cobalt molybdenum ), Fe-Co-V ( iron cobalt vanadium ), MnBi ( BI ).