| 摘要 |
The present invention addresses the problem of providing a sintered magnet production method capable of suppressing the growth of the particles of alloy powder during a sintering process. Provided is a sintered magnet production method including a filling process in which the cavity of a container is filled with an alloy powder of a raw material for a sintered magnet, an orienting process in which the alloy powder in the cavity is oriented by applying an magnetic field to the alloy powder without applying a mechanical pressure, and a sintering process in which the alloy powder oriented by the orienting process is sintered by heating the alloy powder without applying a mechanical pressure, the method being characterized in that: the median D 50 of a particle size distribution of the alloy powder measured by a laser diffraction method is 3 µm or less, and a powder of a high-melting-point material having a higher melting point than the heating temperature in the sintering process is mixed in the alloy powder before or in the filling process, where the median D 50 of the powder of the high-melting-point material is 0.3 µm or less. |
