| 摘要 |
PURPOSE:To obtain powder, the principal ingredient thereof is iron having excellent oxidation stability, by dispersing metallic magnetic powder, the principal ingredient thereof is iron to which an oxide film is formed previously, into polyhydric alcohol containing the metallic salt of alkaline earth metals and making a metal of alkaline earth metals to be contained to the surfaces of the particles of magnetic powder through heating. CONSTITUTION:Metallic magnetic powder, the principal ingredient thereof is iron forming the oxide films onto the surfaces of powdered particles, is dispersed into polyhydric alcohol into which the metallic salt of alkaline earth metals is dissolved. These substances are heated, and the oxide films containing alkaline earth metals are formed onto the surfaces of the particles of metallic magnetic powder, the principal ingredient thereof is iron. Glycerin of the boiling point of 150 deg.C or more or the like is used preferably as polyhydric alcohol, and the organic metallic salt of alkaline earth metals such as barium or the like besides inorganic salt, such as a halide of these alkaline earth metals, a hydroxide, a carbonate, a sulfate or the like is used as metallic salt dissolving into polyhydric alcohol. Metallic magnetic powder making Co or the like contain into iron besides metallic iron powder is used generally as metallic magnetic powder, the principal ingredient thereof is iron before forming the oxide films onto the surfaces of particles, and all of metallic magnetic powder, the principal ingredient thereof is iron manufaccture through all methods regardless of a submerged reduction method, a vapor reduction method and an electrolytic method, are used. |
