Rare Earth Raw Material for Structural Ceramics

Rare earth permanent magnet material is a kind of magnetic material made of samarium, neodymium mixed rare earth metal and transition metal (such as cobalt, iron, etc.) alloy, which is sintered by powder metallurgy method and magnetized by magnetic field.

Rare earth permanent magnets are divided into samarium cobalt (SmCo) permanent magnets and NdFeB permanent magnets. SmCo magnet magnetic energy product in 15- 30MGOe, NdFeB magnet magnetic energy product in 27- 50MGOe, known as the "permanent magnet king", is the highest magnetic permanent magnet material. Samarium cobalt permanent magnets, despite their excellent magnetic properties, contain rare rare earth metal samarium and cobalt, the scarce and expensive strategic metal cobalt, so their development is greatly limited. The development of China's rare earth permanent magnet industry began in the late 1960s. At that time, the leading product was samarium-cobalt permanent magnet. The world sales volume of samarium-cobalt permanent magnet was 630 tons, and that of China was 90.5 tons (including SmCo magnetic powder), which was mainly used in military technology.

Rare earth permanent magnet materials have become important materials in electronic technology communication, used in satellites, radars, traveling wave tubes, circulators, micro motors, micro recorders, aviation instruments, electronic watches, seismometers and other electronic instruments. The applications of rare earth permanent magnets have penetrated into automobiles, household appliances, electronic instruments, nuclear magnetic resonance imagers, audio equipment, micro and special motors, mobile phones and so on. In MEDICAL treatment, the use of rare earth permanent magnet materials for "magnetic point therapy" has greatly improved the curative effect, thus promoting the rapid promotion of "magnetic point therapy". In the application of rare earth in various fields, the development of rare earth permanent magnet materials is the fastest. It has not only brought great impetus to the development of rare earth industry, but also exerted a profound influence on many related industries.

With the progress of science and technology, rare earth permanent magnet material not only the application of computer, automobile, instruments, meters, household appliances, petrochemical industry, health care, aerospace and other industries of various micro motor, and nuclear magnetic resonance (NMR) equipment, electrical, magnetic separation equipment, magnetic force, magnetic therapy apparatus, machinery, such as the need to produce strong gap magnetic field of the components, In addition, emerging fields such as wind power generation, new energy vehicles, variable frequency home appliances, energy-saving elevators, and energy-saving oil pumping units have a growing demand for high-end rare earth permanent magnet materials, and the application market space is huge.