| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-performance rare earth sintered magnet that has a small content of oxygen, high density, and an improved degree of orientation, as compared with the conventional one. SOLUTION: In this manufacturing method of rare earth sintered magnets, alloy coarse powder for the rare earth sintered magnet is ground minutely to an average particle diameter of 1 to 10 μm in a non-oxidizing atmosphere, and the obtained fine particle is collected into the non-oxidizing liquid for manufacturing slurry. In this case, the non-oxidizing liquid includes at least one kind of oil selected from mineral, synthetic, and vegetable oils, and lubricant comprising at least one kind selected from the monohydric alcohol ester of fatty acid, the monohydric alcohol ester of polybasic acid, the fatty acid ester of polyhydric alcohol, and their derivatives. Then, the formation is made by the slurry, and the forming body obtained is subjected to deoiling, sintered, and them heat-treated. |
