发明名称 |
Soft magnetic powder, granulated powder, dust core, electromagnetic component, and method for producing dust core |
摘要 |
Provided is a soft magnetic powder used for obtaining a dust core having a low hysteresis loss, in particular, in a high temperature range. A soft magnetic powder includes an aggregate of composite magnetic particles, each including a soft magnetic particle containing Fe, Si, and Al, and an insulating coating film disposed on the surface thereof, and satisfies the expressions (1) and (2) below: Expression (1) . . . 27≦2.5a+b≦29 and Expression (2) . . . 6≦b≦9, where a represents the Si content (mass %) and b represents the Al content (mass %). The soft magnetic powder is capable of reducing the hysteresis loss, in a high-temperature environment, of a dust core obtained using the soft magnetic powder. |
申请公布号 |
US8797137(B2) |
申请公布日期 |
2014.08.05 |
申请号 |
US201113505003 |
申请日期 |
2011.05.17 |
申请人 |
Sumitomo Electric Industries, Ltd. |
发明人 |
Watanabe Asako;Maeda Toru |
分类号 |
H01F27/24;H01F27/02;H01F5/00;H01F1/00;H01F1/04;C22C38/06;H01F1/33;H01F1/24;H01F41/02;C22C38/08;C22C38/02;C22C38/00;C22C38/04;H01F3/08 |
主分类号 |
H01F27/24 |
代理机构 |
Ditthavong & Steiner, P.C. |
代理人 |
Ditthavong & Steiner, P.C. |
主权项 |
1. A soft magnetic powder comprising an aggregate of composite magnetic particles, each including a soft magnetic particle containing Fe, Si, and Al, and an insulating coating film disposed on a surface thereof,
wherein the soft magnetic powder satisfying the expressions:
978/35≦18/7a +b ≦1023/35and 6.6≦b≦8.4,where a character a represents the Si content (mass %) and a character b represents the Al content (mass %) in the soft magnetic particles. |
地址 |
Osaka-shi JP |