Patent ID: 10923256

Abstract:
To provide an R-T-B based sintered magnet including R: 27.5 to 34.0% by mass, RH: 2 to 10% by mass, B: 0.89 to 0.95% by mass, Ti: 0.1 to 0.2% by mass, Ga: 0.3 to 0.7% by mass, Cu: 0.07 to 0.50% by mass, Al: 0.05 to 0.50% by mass, M (M is Nb and/or Zr): 0 to 0.3% by mass, balance T, and inevitable impurities, the following inequality expressions (1), (2), and (3) being satisfied: [T]−72.3([B]−0.45[Ti])>0  (1)([T]−72.3([B]−0.45[Ti]))/55.85<13[Ga]/69.72  (2)[Ga]≥[Cu]  (3).