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Sintered magnet, motor, automobile, and method for producing sintered magnet 发明授权

2023-02-17 3320 1557K 0

专利信息

申请日期 2025-07-11 申请号 US13384896
公开(公告)号 US9548157B2 公开(公告)日 2017-01-17
公开国别 US 申请人省市代码 全国
申请人 Makoto Iwasaki; Ryota Kunieda; Fumitaka Baba; Satoshi Tanaka; Yoshinori Fujikawa
简介 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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