| 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 the rare earth sintered magnet, R-T-B based (R is at least one type of rare earth elements containing Y, Pr contained in R is 50 atom.% or higher, and T is a transition metal containing Fe and Co) 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 oils, and vegetable oils, and lubricants comprising at least one kind selected from monohydric alcohol ester of fatty acid, monohydric alcohol ester of polybasic acid, fatty acid ester of polyhydric alcohol, and their derivatives. Then, the formation is made by the slurry, and the obtained forming body is subjected to deoiling, sintered, and then heat-treated. |
