The first generation of rare earth permanent magnet material is SmCo5. After years of research and development and improvement of production process, the third generation Nd2Fe14B permanent magnetic material has basically replaced the first and second generation samarium cobalt permanent magnetic materials. It has become the magnetic material with the widest application range, the fastest development speed and the best comprehensive performance. It is one of the important basic materials supporting the modern electronic information industry.
At the same time, the fourth generation of rare earth permanent magnet materials represented by rare earth iron nitrogen (Re-Fe-N system) and rare earth iron carbon (Re-Fe-C system) are in the research and development stage, and it is expected to move to large-scale industrial application in the future.
Development history of rare earth permanent magnet material industry: