发明名称 |
SINTERED MAGNET, MOTOR, AUTOMOBILE, AND METHOD FOR PRODUCING SINTERED MAGNET |
摘要 |
The present invention provides a sintered magnet having superior residual magnetic flux density and coercive force. The sintered magnet of the present invention comprises a group of R-T-B based rare earth magnet crystal particles 2 having a core 4 and a shell 6 covering the core 4, the mass ratio of a heavy rare earth element in the shell 6 is higher than the mass ratio of a heavy rare earth element in the core 4, and the thickest part of the shell 6 in the crystal particles 2 faces a grain boundary triple junction 1. A lattice defect 3 is formed between the core 4 and the shell 6.
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申请公布号 |
US2013009503(A1) |
申请公布日期 |
2013.01.10 |
申请号 |
US201113384896 |
申请日期 |
2011.03.29 |
申请人 |
TDK CORPORATION;IWASAKI MAKOTO;KUNIEDA RYOTA;BABA FUMITAKA;TANAKA SATOSHI;FUJIKAWA YOSHINORI |
发明人 |
IWASAKI MAKOTO;KUNIEDA RYOTA;BABA FUMITAKA;TANAKA SATOSHI;FUJIKAWA YOSHINORI |
分类号 |
H02K21/00;H01F7/02;H01F41/02 |
主分类号 |
H02K21/00 |
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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