| abstract |
To provide a sintered magnet capable of obtaining a high coercive force even when the amount of heavy rare earth element used is reduced. SOLUTION: Sintered magnets R (R always contains one of Nd and Pr): 29.5-33.0 mass%, B: 0.7-0.95 mass% , Al: 0.03-0.6 mass%, Cu: 0.01-1.5 mass%, Co: 3.0 mass% or less (however, 0 mass% is not included), Ga: 0.1 -1.0 mass%, C: 0.05-0.3 mass%, O: 0.03-0.4 mass%, Zr: 0.03-1.5 mass%, and Fe and other elements : Phase 8 composed of the remainder and containing Zr, B and C is formed. [Selection] Figure 3 |