| 摘要 |
Permanent magnetic material of formula (I) Mx-yM1yRE (where M = Co, Fe; M1 = Cu, Ni, Al; RE = Sm, Ce, Gd, Pr, La, Y, Nd or Ho; x " 5 to 8.5 and y = 0.02x to 0.98x.) prepared by mixing the components, forming the mixture into a body with the desired shape, baking the shaped body, heat treating the backed body at a temp in the range from 5 degrees C below m.p. of the composition to 800 degrees C during a period of 1-1000 min., and cooling the treated body at the rate of 0.01-100 degrees C/sec. over the range from the temp. of the heat treatment to at least 500 degrees C. The permanent magnetic materials have a high coercitive power and a high energy products, and are suitable for the preparation of thin layers. |
