| 摘要 |
PROBLEM TO BE SOLVED: To provide the composition of a high magnetic characteristic, by epitaxtially connecting the crystallite of an RFeB composition or RFeCoB composition (R is more than one type of rare earth elements) in a tetragonal system crystal structure having a specified lattice constant to the crystallite of Nd oxide in a cubic system crystal structure, and setting it to be an oriented complex. SOLUTION: In a permanent magnet composition, metallic rough grinding objects constituted of RFeB alloy having a prescribed composition as a magnet, RFeCoB alloy, or Nd forming a part of the composition, Nd and Fe or Nd, Fe and Co are mixed with Zn rough grinding objects in inactive organic solvent containing the minute amount of water in the flow of inert gas containing the minute amount of oxygen, the are wet-ground and are made into fine ground objects whose average particles size is 1-100 μm. The grinding objects of a lacking component are added if necessary, and they are mixed in organic solvent. They are dried and fired in inert gas stream and raw material powders are obtained. The fired powders are pressed in a magnetic field, are sintered and the permanent magnet is obtained. |
