| 摘要 |
PURPOSE:To produce a permanent magnet material which is improved in coercive force and has the small variance thereof by adding a specific ratio of metallic oxide materials to the permanent magnet material consisting of rare earth elements, Fe, Co, B, etc. expressed by the specific formula. CONSTITUTION:1 or >=2 kinds of crystalline material and amorphous materials essentially consisting of the metallic oxides are added at <=1wt% (exclusive of 0) to the compd. expressed by the compsn. formula R1-y-z(Re10xCox)yXz. R in the formula is 1 or >=2 kinds of the rare earth elements including Y and X is 1 or 2 kinds of B, C, N, Si, and P which are specified to 0<x<=0.3, 0.55<=y<=0.85, 0.01<=z<=0.15. The crystalline or amorphous materials essentially consisting of the metallic oxides which soften or melt at the temp. lower than the m.p. of an R-Fe-Co-X alloy are preferable, and lead oxide, bismuth oxide, silicon oxide, etc. are used. The permanent magnet material which has the high residual magnetic flux density and max. energy product and is improved in the force is thus obtd. |
