公开(公告)号：US20240212899A1

公开(公告)日：2024-06-27

申请号：US18486470

申请日：2023-10-13

申请人： GRIREM HI-TECH CO., LTD. ,  GRIREM ADVANCED MATERIALS CO., LTD.

发明人： Haijun PENG ,  Yang LUO ,  Zilong WANG ,  Shengjie ZHU ,  Dunbo YU ,  Hongbin ZHANG ,  Weikang SHAN ,  Tianjiao MA ,  Shuai CUI

IPC分类号： H01F1/059 ,  B22F1/05 ,  B22F1/065 ,  B22F1/142 ,  B22F1/145 ,  B22F9/22 ,  C22C33/02 ,  C22C38/00

CPC分类号： H01F1/059 ,  B22F1/05 ,  B22F1/065 ,  B22F1/142 ,  B22F1/145 ,  B22F9/22 ,  C22C33/0235 ,  C22C38/001 ,  C22C38/005 ,  B22F2201/016 ,  B22F2201/02 ,  B22F2201/20 ,  B22F2301/355 ,  B22F2304/10 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

摘要： Disclosed are anisotropic samarium-iron-nitrogen magnetic alloy powder and a preparation method therefor. The anisotropic samarium-iron-nitrogen magnetic alloy powder has a chemical formula of Sm2Fe17N3, and has a Th2Zn17 crystal structure. In the alloy powder, the granularity is: D90≤5 μm and D10≥0.5 μm, the average sphericity ≥0.7, the coercivity Hcj≥10 kOe, and the square degree Q≥0.5. The preparation method includes: S1: mixing iron powder, samarium oxide powder and calcium granules uniformly; S2: placing the mixture into a rotating heat treatment furnace, adding high-temperature-resistant balls, performing vacuumizing, introducing a reductive diffusion protective gas, and heating a furnace body; S3: cooling the furnace body, performing vacuumizing, and introducing a nitriding gas; and S4: taking out and separating the cooled powder and balls, washing the powder, and drying the powder in a vacuum environment to obtain the anisotropic samarium-iron-nitrogen magnetic alloy powder.