Abstract：RFe12 (R for rare earth) type rare earth permanent magnet material has the characteristics of low rare earth content and excellent intrinsic magnetic properties. It can save rare earth resources and achieve high magnetic properties at the same time, making it the most promising candidate for a new generation of high-performance rare earth permanent magnetic material. However, how to realize its intrinsic magnetic properties into extrinsic magnetic properties, that is, to achieve high coercivity in anisotropic microstructures has always been a difficult point in research, which hinders the application of RFe12 rare earth permanent magnet materials. Like other generations of magnetic materials, the development of RFe12-type rare earth permanent magnetic materials is also facing many challenges. In recent years, researchers have been focusing on stabilizing the structure of RFe12 phase while improving the intrinsic magnetic properties by replacing elements, doping and improving the synthesis process. Based on the crystal structure (ThMn12 structure) of RFe12 type rare earth permanent magnetic materials, the effect of substitutions of different crystal positions was analyzed. Meanwhile, the application of simulation calculation in the development process of magnetic materials was discussed, and the prospect of the new generation of high-performance rare earth permanent magnetic materials was also made.
2021, Vol. 28 