| 摘要 |
PURPOSE:To manufacture highly efficient rare earth permanent magnet with low cost by using an alloy in which semimetal, semiconductor elements are added to a system composed of Ce-Pr-Nd-La alloy and Fe, and a part of Fe is substituted by a specified element as raw material. CONSTITUTION:The alloy is Ce1-X-Y-ZPrXNdYLaZ(Fe1-AMA)B, in atomic ratio, (but M in above formula exhibits one or >=2 kinds among group of semimetal, semiconductor elements of B, C, Si, Ge, P, S, etc.). Respective coefficients have values of 0.1<=X<=0.5, 0.1<=Y<=0.85, 0<=Z<=0.1, 0.02<=A<=0.2, 4.0<=B<=8.0, 0<1-X- Y-Z<0.8. Fe of <=0.1mol is substituted by one or >=2 kinds among respective elements of Al, Ga, In, Sn, Pd, Bi. The powder of the alloy of the composition is kneaded with epoxy resin, compression molded in magnetic field. Next, compression molded body is heated, sintered, thereby, a highly efficient rare earth permanent magnet is manufactured. |
