| 简介 |
PROBLEM TO BE SOLVED : To provide a method for manufacturing a rare-earth permanent magnet having superior stability, high corrosion resistance and high hydrogen barrier performance.SOLUTION : An organic metal compound solution doped with an organic metal compound represented by M-(OR)(wherein M contains at least one kind from among Nd, Pr, Dy, Tb, V, Mo, Zr, Ta, Ti, W and Nb, R is any one of 2-6C alkyl groups and may be a straight chain or a branched chain, and x is an arbitrary integer) is doped to a pulverized magnetic powder, and the organic metal compound is uniformly deposited to the surface of the magnetic particles. After that, the dried magnetic powder is maintained in a vacuum or inert gas atmosphere at 600°C or higher than and lower than 900°C for 0.01 min to less than one hour to execute heat treatment. Further, the heat-treated magnetic powder is molded, baked at 800-1, 180°C, cut into a product shape (e.g. like a cube), and polished to finish the surface, and a sintered compact 72 is heat-treated, thereby a permanent magnet 1 is manufactured. |
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