Rare earth iron nitrogen permanent magnet materials are the fourth generation of rare earth permanent magnet materials. Domestic industrialization development is limited.

Rare earth permanent magnet materials are permanent magnet materials made from alloys composed of rare earth metals and transition metals. At present, rare earth permanent magnet materials have developed to the third generation. NdFeB permanent magnet materials are representative products of the third generation of rare earth permanent magnet materials. They have high performance and…