RARE EARTH PERMANENT MAGNET MATERIAL, RAW MATERIAL COMPOSITION, PREPARATION METHOD, APPLICATION, AND MOTOR

摘要

A rare earth permanent magnet material, a raw material composition, a preparation method, an application, and a motor. The present rare earth permanent magnet material comprises the following ingredients in mass percentage: R 28.5-33.0wt.%; RH>1.5wt.%; Cu 0-0.08wt.%, but not 0wt.%;Co 0.5-2.0 wt.%; Ga 0.05-0.30wt.%; B 0.95-1.05wt.%; and the remainder being Fe and unavoidable impurities. The R-T-B system permanent magnet material has excellent properties and, under the condition that the content of heavy rare earth elements in the permanent magnetic material is 3.0-4.5wt.%, Br≥12.78kGs and Hcj≥29.55kOe; under the condition that the content of heavy rare earth elements in the permanent magnet material is 1.5-2.5wt.%, Br≥13.06kGs and Hcj≥26.31 kOe.