| 摘要 |
PROBLEM TO BE SOLVED: To improve residual magnetic flux density, while restraining deterioration of coercive force, in a ferrite sintered magnet manufactured by using a dry molding method where cost can be reduced, which normally high characteristics are hardly obtained. SOLUTION: This method for manufacturing a dry molding sintered magnet is provided with a mixing process where at least a part of starting material powder is mixed, and mixed powder is obtained, in the case that a sintered magnet which has Sr-based ferrite of a hexagonal magneto plumbite type as a main phase and contains La and Co is manufactured; a calcinating process where the mixed powder is calcinated and a calcinated object is obtained; a granulating process where the calcinated object is granulated and calcinated object powder is obtained; a molding process where powder to be molded which contains the calcinated object powder is subjected to dry molding in a magnetic field, and a molded object is obtained; and a sintering process where the molded object is baked and a sintered object is obtained. In the calcinating process, a calcinated object whose mean primary grain diameter exceeds 1 μm is obtained. |
