| 简介 |
PROBLEM TO BE SOLVED : To provide a permanent magnet that previously reduces the amount of carbon that magnet particles contain before sintering even when wet pulverization is employed, and a method of manufacturing the permanent magnet.
SOLUTION : Roughly pulverized magnet powder is pulverized by a bead mill in a solvent together with an organic metallic compound corresponding to M-(OR)x (where M contains at least one kind among Nd, Pr, Dy, and Tb as rare earth elements, R is a substituent comprising carbon hydride and may be either a straight chain or a branch, and (x) is an arbitrary integer), and the organic metallic compound is stuck uniformly on magnet particle surfaces. Then a powder compaction molded molding is held in a hydrogen atmosphere at 200 to 900°C for several hours to be subjected to in-hydrogen calcination treatment. Then sintering is carried out to manufacture the permanent magnet 1.
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