METHOD FOR PRODUCING R-T-B SINTERED MAGNET

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A method for producing a sintered R-T-B based magnet includes the steps of : providing R-T-B based alloy powders A and B so that the R-T-B based alloy powder B has a particle size D50 that is smaller by at least 1.0 μm than that of the R-T-B based alloy powder A and that there is a difference ΔRH of at least 4 mass % between the higher content of a heavy rare-earth element RH in the R-T-B based alloy powder B and the lower content of the heavy rare-earth element RH in the R-T-B based alloy powder A; mixing these two R-T-B based alloy powders A and B together; compacting the mixed R-T-B based alloy powder to obtain a compact with a predetermined shape; and sintering the compact.