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1. Introduction：

Rare earth permanent magnet materials have been widely used in national defense fields such as aerospace, modern radar, and ships, as well as high-speed computers, mobile communications, new energy vehicles, wind power generation, industrial robots and other national economic fields due to their high magnetic properties.

GRIREM has two sintered NdFeB factories in Weihai and Qingdao, Shandong Province. They have been engaged in the manufacture of high-performance sintered NdFeB magnet for many years, and they have the unique leading edge in the preparation of high-performance magnets, micro-magnetic steel processing and post-processing. The current annual production capacity is 2500 tons. And the products are mainly used in mobile phone?speakers, receivers, camera motors, VCM, vibration micro motors, TWS headphones, smart speakers, servo micro special motors and other fields.

2. Magnetic properties