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PERMANENT MAGNET AND METHOD OF MANUFACTURING PERMANENT MAGNET 发明申请

2023-10-03 1470 709K 0

专利信息

申请日期 2025-07-11 申请号 JP2011069072
公开(公告)号 JP2011228664A 公开(公告)日 2011-11-10
公开国别 JP 申请人省市代码 全国
申请人 NITTO DENKO CORP
简介 PROBLEM TO BE SOLVED : To provide a permanent magnet that previously reduces the amount of carbon that magnet particles contain before sintering even when wet pulverization is employed, and a method of manufacturing the permanent magnet. SOLUTION : Roughly pulverized magnet powder is pulverized by a bead mill in a solvent together with an organic metallic compound corresponding to M-(OR)x (where M contains at least one kind among Nd, Pr, Dy, and Tb as rare earth elements, R is a substituent comprising carbon hydride and may be either a straight chain or a branch, and (x) is an arbitrary integer), and the organic metallic compound is stuck uniformly on magnet particle surfaces. Then a powder compaction molded molding is held in a hydrogen atmosphere at 200 to 900°C for several hours to be subjected to in-hydrogen calcination treatment. Then sintering is carried out to manufacture the permanent magnet 1. COPYRIGHT : (C)2012, JPO&INPIT


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