| 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 metallic salt and making a metal 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 metallic salt selected from copper, zinc or aluminum is dissolved. These substances are heated, and the oxide films containing the metal selected from copper, zinc or aluminum are formed onto the surfaces of the particles of metallic magnetic powder, the principal ingredient thereof is iron. Ethylene glycol or the like of the boiling point of 150 deg.C or more is used as polyhydric alcohol, and the organic metallic salt of copper or zinc or aluminum or the like besides inorganic salt, such as a halide of these metals, a hydroxide, a carbonate, a sulfate or the like is used as metallic salt dissolved into polyhydric alcohol. Metallic magnetic powder manufactured by 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 manufactured through all methods regardless of a submerged reduction method, a vapor reduction method and an electrolytic method, are used. |
