发明名称 |
RARE EARTH SINTERED MAGNET, METHOD FOR PRODUCING SAME, MOTOR AND AUTOMOBILE |
摘要 |
A rare earth sintered magnet 10 including a magnet body that includes a rare earth compound, and a protective layer on the magnet body, having a first layer and a second layer in that order from the magnet body side, wherein the surface portion of the magnet body has a higher heavy rare earth element content than the interior of the magnet body that is surrounded by the surface portion, the first layer includes a rare earth oxide, the mass ratio of the heavy rare earth element being 1 or greater with respect to the light rare earth element, and the second layer includes an oxide containing iron and/or boron which is different from the rare earth oxide, the second layer having a lower rare earth oxide content than the first layer. |
申请公布号 |
EP2555206(A1) |
申请公布日期 |
2013.02.06 |
申请号 |
EP20110762801 |
申请日期 |
2011.03.28 |
申请人 |
TDK CORPORATION |
发明人 |
TANAKA, SATOSHI;BABA, FUMITAKA;IWASAKI, MAKOTO;ISHIZAKA, CHIKARA |
分类号 |
H01F1/053;B22F3/00;B22F3/24;C22C33/02;C22C38/00;H01F1/08;H01F7/02;H01F41/02 |
主分类号 |
H01F1/053 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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