| 简介 |
PROBLEM TO BE SOLVED : To produce a nano-composite magnet without using any rare earth element.
SOLUTION : A magnetic particle 10 has a core part 11 that is a soft magnetic phase containing Fe and a shell part 12 that is a hard magnetic phase containing ε-Fe2O3 and covers at least a part of the core part 11. The magnetic particle 10 is produced by oxidizing a surface of a Fe powder. Thus, the magnetic particle 10 can be produced by oxidizing Fe, without using any rare earth element. By producing a sintered magnetic or a bond magnetic using the magnetic particle 10, the nano-composite magnet can be produced without using any rare earth element.
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