Samarium cobalt magnet is made of samarium, cobalt and other metal rare earth materials by mixing, melting into alloy, after crushing, pressing, sintering made of a magnetic material, with high magnetic energy product, very low temperature coefficient, the highest working temperature up to 350℃, negative temperature is not limited, in the working temperature of 180℃ above, Its maximum magnetic energy volume and temperature stability and chemical stability are more than NdFeB permanent magnet material. It has strong corrosion resistance and oxidation resistance. Therefore, it is widely used in aerospace, microwave devices, communications, medical equipment, instruments, meters, various magnetic transmission devices, sensors, magnetic processors, motors, magnetic cranes, etc.