| 简介 |
A rare-earth sintered magnet according to the present invention includes : 28.5 mass % to 32.0 mass % of R, which includes Tb and at least one of the other rare-earth elements; 0.91 mass % to 1.15 mass % of B; at most 0.35 mass % of oxygen; and Fe with or without Co and inevitably contained impurities as the balance. The magnet includes 3.2 mass % to 5.2 mass % of Tb, and has a remanence Br of at least 1.29 T, a coercivity HcJ of at least 2.4 MA/m and a maximum energy product (BH)max of at least 320 kJ/m3. |
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