| 简介 |
A magnet manufacturing method has preparing magnetic powder 1 of a hard magnetic material, which includes one or more of an Fe-N-based compound and an R-Fe-N-based compound (R : rare earth element) (S1), pressurizing and molding the magnetic powder at a pressure equal to or higher than a fracture pressure at which particles of the magnetic powder are destroyed in order to obtain a primary molding 5 (S4), and heating the primary molding 5 at a temperature T4 lower than a decomposition temperature T2 of the magnetic powder 1 (S5). A particle size distribution measured for the magnetic powder 1 indicates that, for the magnetic powder 1, a ratio (D50/D3) of a particle size with a cumulative frequency of 50% (D50) to a particle size with a cumulative frequency of 3% (D3) is less than eight. |
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