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R-T-B rare earth permanent stone materials, manufacturing methods and applications 发明申请

2023-11-08 1820 1731K 0

专利信息

申请日期 2025-07-11 申请号 KR1020217037091
公开(公告)号 KR1020210151940A 公开(公告)日 2021-12-14
公开国别 KR 申请人省市代码 全国
申请人 XIAMEN TUNGSTEN CO LTD; FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD
简介 Disclosed are an R-T-B-based permanent magnet material, a preparation method therefor and the use thereof. The R-T-B-based permanent magnet material I comprises the following components : 29.0-32.5% of R including RH, 0.30 to 0.50 wt.% of Cu, 0.05 to 0.20 wt.% of Ti, 0.85 to 1.05 wt.% of B, 0.1 to 0.3 wt.% of C, 66 to 68 wt.% of Fe, wherein R is a rare earth element and R at least includes Nd; and RH is a heavy rare earth element and RH at least includes Tb or Dy. A Cu-Ti-C grain boundary phase is formed in the R-T-B-based permanent magnet material I, and Hcj is significantly improved.


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