| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing Sm-Fe-N based magnetic powder for a bond magnet which is excellent in mobility at the time of bond magneto formation and further in stability at the time of kneading with resin, and to provide a bond magnet. <P>SOLUTION: After iron oxide particle powder and samarium oxide particle powder are mixed, the mixture is subjected to reduction reaction, and mixture of iron particles and samarium oxide particles is formed. After an oxide skin is formed on the surface of the iron particle by performing stabilizing treatment in a temperature range of 30-150°C under oxygen-containing atmosphere, reduction spread reaction is performed by mixing metal Ca in a temperature range of 800-1,200°C under inert gas atmosphere. After cooling is performed to less than 300°C under inert gas atmosphere, changeover is performed to nitrogen atmosphere, temperature is raised up to specified temperature in a temperature range of 300-600°C, and continuously, nitriding reaction is performed in a temperature range of 300-600°C. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
