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R-T-B-M-A SYSTEM RARE EARTH PERMANENT MAGNET AND METHOD FOR PRODUCING SAME 发明申请

2023-08-03 4010 1417K 0

专利信息

申请日期 2025-07-09 申请号 WOJP10072782
公开(公告)号 WO2011125262A1 公开(公告)日 2011-10-13
公开国别 WO 申请人省市代码 全国
申请人 KABUSHIKI KAISHA YASKAWA DENKI; Yantai Shougang Cixing Cailiao Co Ltd; Lin Xi Feng; Ding Kai Hong; Lu Si Jing; Wang Guo Hai; Yu Jing Chun; Li Zhong Hua; Wang Yong Jie; MIYAMOTO Yasuhiro
简介 Disclosed is a low-cost R-T-B-M-A system rare earth permanent magnet which has improved coercivity (Hcj) without being decreased in residual magnetic flux density (Br) by controlling nitrogen (N), carbon (C), oxygen (O) and hydrogen (H) to appropriate amounts. Specifically disclosed is a rare earth permanent magnet material which is mainly configured of an R2T14B compound that contains 24-34% by mass of R, 63-74% by mass of T and 0.5-1.5% by mass of B with the balance made up of M and A. The trace elements A are 1, 100-2, 000 ppm of C, 10 ppm or less of H, 1, 300-2, 000 ppm of O and 150 ppm or less of N. The rare earth permanent magnet material is pulverized in an inert gas atmosphere and has an average particle diameter of 2-5 μm.


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