Patent ID: 8182618

Claim:
A sintered rare-earth magnet comprising an Nd 2 Fe 14 B type crystalline phase as its main phase and Al as an additive; wherein the rare-earth magnet includes at least one light rare-earth element LR selected from the group consisting of yttrium and the rare-earth elements other than Dy, Ho and Tb, and at least one heavy rare-earth element HR selected from the group consisting of Dy, Ho and Tb; and α1, α2 and β of the light and heavy rare-earth elements LR and HR and Al satisfy the inequalities 25≦α1+α2≦40 mass %, 4.0≦α2≦40 mass %, β≧0.35 mass %, and 0.04≦β/α2≦0.12; and the rare-earth magnet further includes 0.01 to 0.2 mass % of at least one additive element M that is selected from the group consisting of Si, Ti, V, Cr, Mn, Ni, Cu, Zn, Ga, Zr, Nb, Mo, Ag, In, Sn, Hf, Ta, W, Pb and Bi.