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Application And Latest Research Of Samarium-Cobalt Magnets
Oct 22, 2018

Application and Latest Research of Samarium-Cobalt Magnets

The samarium-cobalt magnet is a rare earth magnet which is a magnet made of rhodium, cobalt and other rare earth materials. Developed in 1970, samarium-cobalt magnets are the second most magnetistic magnets today, with a high maximum magnetic energy product (BHmax), high coercivity, brittleness, and cracking. Therefore, it is widely used in aerospace, defense military, microwave devices, communications, medical equipment, instruments, meters, various magnetic transmission devices, sensors, magnetic processors, motors, magnetic cranes, etc.

In 2012, Toshiba Corporation of Japan developed a high-iron-concentration samarium-cobalt magnet for engines. This magnet is completely free of rare earth element lanthanum, but its magnetic force is stronger than the heat-resistant neodymium magnet widely used today.

The newly developed high-iron concentration samarium-cobalt magnet uses Toshiba's independently developed heat treatment technology, which makes the samarium-cobalt magnet, which is not as magnetic as a neodymium magnet, have a strong magnetic force beyond the heat-resistant neodymium magnet in an environment above 100 degrees Celsius. In order to increase the magnetic force, the researcher has increased the weight ratio of iron from 15% to 20% to 25%. In order to achieve the best condition, the temperature, time and pressure are adjusted during sintering, thereby reducing the magnetic resistance. The role of factors such as oxides.