| 简介 |
Disclosed is a method for producing an R-T-B sintered magnet, which comprises : a step of preparing an R-T-B alloy powder (A) and another R-T-B alloy powder (B); a step of mixing the R-T-B alloy powder (A) and the R-T-B alloy powder (B); a step of molding the mixed R-T-B alloy powder into a molded body having a predetermined shape; and a step of sintering the molded body. In this connection, the particle diameter D50 of the R-T-B alloy powder (B) is smaller than the particle diameter D50 of the R-T-B alloy powder (A) by 1.0 μm or more, and the difference (∆RH) in mass% between the amount of heavy rare earth elements (RH) contained in the R-T-B alloy powder (A) and the amount of heavy rare earth elements (RH) contained in the R-T-B alloy powder (B) is specified that the RH content in the R-T-B alloy powder (B) is higher than the RH content in the R-T-B alloy powder (A) by 4 mass% or more. |
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