Which advantages does the ferrite of permanent magnets have?

　　Permanent magnets' ferrite mainly has barium ferrite and strontium ferrite, its resistivity is high, the coercive force is big, which can be effectively used in air gap magnetic circuit, especially for small generator and motor magnet.

　　Permanent magnets' ferrite excludes precious metals nickel, cobalt and so on, with rich source of raw materials, simple process, low cost, iit can replace the aluminum nickel and cobalt permanent magnets' manufacturing magnetic separator, magnetic thrust bearing, speaker, microwave devices. But the maximum magnetic energy product is low, temperature stability, is of brittle, fragile, no impact and vibration resistance, suitable for measuring instruments and precision requirements of the magnetic device.

　　Permanent magnets' ferrite are mainly permanent magnetic material of rare earth cobalt and neodymium iron boron permanent magnetic material. The former is intermetallic compound that is formed by rare earth element cerium, praseodymium, neodymium, lanthanum and cobalt, and the magnetic energy product can reach 150 times of steel, aluminum nickel and cobalt permanent magnetic materials in the 3 ~ 5 times, the permanent magnets' ferrite's 8 ~ 10 times, low temperature coefficient, the magnetic stability, coercive force of up to 800000 an / m.