文件类型:PDF文档
文件大小:1910K
Disclosed are a permanent magnet and a manufacturing method for the permanent magnet in which the amount of carbon contained in the magnet grains can be pre-reduced before sintering, even when using wet milling. Coarsely pulverized magnet powder and an organometallic compound represented by the formula M-(OR)x are pulverized in a solvent by a bead mill, uniformly depositing the organometallic compound on the surface of the magnet grains. Afterwards, calcination in hydrogen is carried out by retaining a molded article, formed by powder compacting, in a hydrogen atmosphere for several hours at 200℃-900℃. Afterwards, a permanent magnet (1) is manufactured by sintering. (In the formula, M includes at least one among the rare earth elements Nd, Pr, Dy, Tb. R is a substituent group comprising a hydrocarbon, and can be a straight chain or a branched chain. x is an arbitrary integer.)