公开(公告)号：US20240246144A1

公开(公告)日：2024-07-25

申请号：US18563792

申请日：2022-05-20

申请人： SHOEI CHEMICAL INC.

发明人： Masashi UMEDA ,  Naoki ARIMITSU ,  Michiko USUI ,  Yuji SATO ,  Hayato TATENO

IPC分类号： B22F1/16 ,  B22F1/05 ,  H01F1/20

CPC分类号： B22F1/16 ,  B22F1/05 ,  H01F1/20 ,  B22F2301/35 ,  B22F2302/25 ,  B22F2302/256 ,  B22F2302/45 ,  B22F2304/058 ,  B22F2304/10

摘要： An insulated covered soft magnetic powder in accordance with embodiments of the present invention comprises a soft magnetic powder having an iron content of 99.0 wt. % or more wherein at least part of the surface of the soft magnetic powder is covered with an insulating covering oxide. The insulated covered soft magnetic powder has a 50% volume cumulative particle diameter (D50) by laser diffraction/scattering particle size distribution measurement of 0.01 μm to 2.0 μm, an oxygen content of 0.1 wt. % to 2.0 wt. %, a carbon content and a nitrogen content of the entire insulated covered soft magnetic powder of 0 wt. % to 0.2 wt. %, and 0 wt. % to 0.2 wt. %, respectively. The total content of oxygen, carbon and nitrogen of the insulated covered soft magnetic powder is 0.1 wt. % to 2.0 wt. % of the entire insulated covered soft magnetic powder.