RARE EARTH SINTERED MAGNET, AND ITS MANUFACTURING METHOD

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PROBLEM TO BE SOLVED : To provide a rare earth sintered magnet that has a further improved residual magnetic flux density than the case when Al and Cu are added while exerting coercitivity equivalent to the case when Al and Cu are added. SOLUTION : The rare earth sintered magnet includes 12.0-15.0 atom% of a rare earth element (being at least one kind of element selected from a group composed of Nd, Pr, Gd, Tb, Dy, and Ho and including 50% or more of Nd and/or Pr), 5.5-8.5 atom% of boron (B), 0.005-0.30 atom% of silver (Ag), 0.05-1.0 atom% of an element M (M is at least one kind of element selected from a group composed of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W), the residual iron (Fe), and inevitable impurities. COPYRIGHT : (C)2007, JPO&INPIT