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R-Fe-B ANISOTROPIC SINTERED MAGNET 发明申请

2023-10-03 4550 1162K 0

专利信息

申请日期 2025-07-11 申请号 EP08829605
公开(公告)号 EP2184747A1 公开(公告)日 2010-05-12
公开国别 EP 申请人省市代码 全国
申请人 Hitachi Metals Ltd
简介 An R-Fe-B based anisotropic sintered magnet according to the present invention has, as a main phase, an R2Fe14B type compound that includes a light rare-earth element RL (which is at least one of Nd and Pr) as a major rare-earth element R, and also has a heavy rare-earth element RH (which is at least one element selected from the group consisting of Dy and Tb). In the crystal lattice of the main phase, the c-axis is oriented in a predetermined direction. The magnet includes a portion in which at least two peaks of diffraction are observed within a 2θ range of 60.5 degrees to 61.5 degrees when an X-ray diffraction measurement is carried out using a CuK α ray on a plane that is located at a depth of 500 µm or less under a pole face of the magnet and that is parallel to the pole face.


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