| 申请日期 | 2025-09-11 | 申请号 | EP08790126 |
| 公开（公告）号 | EP2169689A1 | 公开（公告）日 | 2010-03-31 |
| 公开国别 | EP | 申请人省市代码 | 全国 |
| 申请人 | Hitachi Metals Ltd | ||
| 简介 | In an R-Fe-B based rare-earth sintered magnet according to the present invention, at a depth of 20 µm under the surface of its magnet body, crystal grains of an R2Fe14B type compound have an (RL1-xRHx)2Fe14B (where 0.2≦x≦0.75) layer with a thickness of 1 nm to 2 µm in their outer periphery. In this case, the light rare-earth element RL is at least one of Nd and Pr, and the heavy rare-earth element RH is at least one element selected from the group consisting of Dy, Ho and Tb. | ||
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