| 摘要 |
PURPOSE:To obtain a permanent magnet contg. a rare earth element and having a much larger maximum energy product by adding Se, Te or Pb to a rare earth element-iron type permanent magnet material having a specified composition. CONSTITUTION:This permanent magnet material is represented by general formula I or II, wherein R is one or more kinds of rare earth elements, X is one or more among B, C, N, Si and P, A is one or more among Se, Te and Pb, 0.60<=alpha<=0.85, 0<beta<0.15, 0.001<=gamma<=0.05, M is one or more among Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, Zn, Ga, In and Tl and 0<delta<=0.20. Since the permanent magnet material contains one or more among Se, Te and Pb, the coercive force (BHC, IHC) can be improved and the maximum energy product [(BH)max] is further increased. |
