What is the relationship between rare earth and magnetic material?
Rare earth permanent magnet (SmCo) divided SmCo permanent magnet and NdFeB permanent magnet (NdFeB). Among them, the magnetic energy of SmCo magnets is between 15--30MGOe, and the magnetic energy of NdFeB system magnets is between 27--50MGOe. It is called "permanent magnet king", and is the highest magnetic permanent magnet material at present. SmCo permanent magnets, despite its excellent magnetic properties, but containing rare rare earth samarium metal reserves and scarce and expensive strategic metal cobalt, therefore, its development has been greatly restricted. The development of rare earth permanent magnet industry in China started in the end of 60s, was the dominant product is samarium cobalt permanent magnet, samarium cobalt permanent magnet world sales of 630 tons, 90.5 tons in China (including SmCo powder), mainly used in military technology.
Rare earth permanent magnet is an alloy composed of samarium and neodymium mixed rare earth metal and transition metal (such as cobalt, iron, etc.). It is pressed and sintered by powder metallurgy method and magnetized by magnetic field to produce a kind of magnetic material.
Rare earth is one of the raw material of magnetic material, such as rare earth permanent magnet material. That is, rare earths can be made into magnetic materials for use.
