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MAGNETIC MATERIAL AND METHOD FOR MANUFACTURING THE SAME 发明申请

2023-09-04 1320 356K 0

专利信息

申请日期 2025-07-17 申请号 JP2011022975
公开(公告)号 JP2012164764A 公开(公告)日 2012-08-30
公开国别 JP 申请人省市代码 全国
申请人 TOYOTA CENTRAL RES DEV
简介 PROBLEM TO BE SOLVED : To provide a magnetic material capable of developing high coercive force even without using Dy, etc. SOLUTION : The magnetic material comprises a main phase including a R2Fe14B crystal grain (R : rare earth elements), and a grain boundary phase formed between the crystal grains. The crystal grain has a shape with round corners, and a maximum width of 500 nm or less, and the grain boundary phase include a crystal aggregate with nano size of a minimum width of one nm or more. The magnetic material is obtained, for example, by heating an adhesion amorphous material with a diffusion material (for example, R-Cu) adhered to a R-Fe-B amorphous material to form in parallel the main phase including the R2Fe14B crystal grain, and the grain boundary phase formed between the crystal grains. Thereby, the magnetic material with very high coercive force is obtained even without diffusing Dy, etc. being rare elements into the grain boundary. COPYRIGHT : (C)2012, JPO&INPIT


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