| 简介 |
A sintered magnet of a preferred embodiment has a composition comprising : R (R is a rare earth element that must contain any one of Nd and Pr.) : 29.5 to 33.0 mass %; B : 0.7 to 0.95 mass %; Al : 0.03 to 0.6 mass %; Cu : 0.01 to 1.5 mass %; Co : 3.0 mass % or less (provided that 0 mass % is not included.); Ga : 0.1 to 1.0 mass %; C : 0.05 to 0.3 mass %; O : 0.03 to 0.4 mass %; and Fe and other elements : a balance, and wherein a content of heavy rare earth elements in total is 1.0 mass % or less, and wherein the following relations are satisfied : 0.29<[B]/([Nd]+[Pr])<0.40 and 0.07<([Ga]+[C])/[B]<0.60, where [Nd], [Pr], [B], [C] and [Ga] represent the numbers of atoms of Nd, Pr, B, C and Ga, respectively. |
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