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Rare earth magnet 发明申请

2023-08-21 3390 643K 0

专利信息

申请日期 2025-07-10 申请号 JP2016062356
公开(公告)号 JP2016184736A 公开(公告)日 2016-10-20
公开国别 JP 申请人省市代码 全国
申请人 TDK CORP
简介 PROBLEM TO BE SOLVED : To provide a rare earth magnet which is usable under a high-temperature environment and suppressed in high-temperature demagnetizing factor. SOLUTION : A rare earth sintered magnet is configured so as to contain main phase particles having an Al concentration difference in main phase particles. That is, a rare earth magnet contains crystalline particles having an R2T14B-type crystal structure as a main phase, the main phase particles contain main phase particles having an Al concentration difference in particles, and when the highest concentration of Al in the main phase particles having the concentration difference is represented by αAl and the lowest concentration is represented by βAl, by setting the concentration ratio A (A=αAl/βAl) of αAl and βAl to 1.10 or more, a crystal magnetic anisotropy distribution is caused to occur in the main phase, thereby making it difficult to suffer a thermal effect and suppressing the high-temperature demagnetizing factor. SELECTED DRAWING : Figure 2 COPYRIGHT : (C)2017, JPO&INPIT


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