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R-T-B BASED SINTERED MAGNET 发明申请

2023-09-03 2600 296K 0

专利信息

申请日期 2025-07-11 申请号 JP2004099447
公开(公告)号 JP2005286173A 公开(公告)日 2005-10-13
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 enable acquisition of a high coercivity and possession of a wide sintering temperature width by providing a fine crystalline structure, even when the quantity of oxygen in a sintered body is low. SOLUTION : An R-T-B based sintered magnet is a sintered body which comprises main phase crystalline grains made of an R2T14B phase (R denoting one, two, or more types of elements selected from among rare earth elements, T denoting one, two, or more types of elements selected from among transition metal elements including Fe, Fe and Co), and a grain boundary phase, including more Rs than the main phase crystalline grains. The sintered body includes an Nb-Fe compound in the main-phase crystalline grains. The R-T-B based sintered magnet can be obtained by a mixing method of including Nb in an alloy for main phase formation. COPYRIGHT : (C)2006, JPO&NCIPI


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