Ferrite magnet, mainly comprised of BaFe12O19 and SrFe12O19, is manufactured by the method of ceramic processing technique with brittleness. For such property, as well as its good temperature resistance and lower prices, Ferrite magnet has been the most widely used permanent magnet. With a differential permeability higher than a thousand,a resistivity 1011 times that of metals,and a low eddy current loss,it is a premium material for high-frequency electromagnetic devices. Besides, they can also be widely applied in electroacoustic, telecom, electric meter, motor, memory devices, microwave components.