RARE EARTH SINTERED MAGNET AND ITS MANUFACTURING METHOD

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PROBLEM TO BE SOLVED : To provide a rare earth sintered magnet whose remaining magnetic flux density is improved when compared to that whereto Al and Cu are added, while showing coercive force equivalent to that whereto Al and Cu are added.SOLUTION : In the rare earth sintered magnet, 12.0 to 15.0 atomic% of rare earth element R (R is at least one kind of element selected from a group consisting of Nd, Pr, Gd, Tb, Dy, and Ho, and contains at least ≥50% of Nd and/or Pr), 5.5 to 8.5 atomic% of B, 0.005 to 0.30 atomic% of Ag, the balance of Fe and inevitable impurities.COPYRIGHT : (C)2007, JPO&INPIT