| 摘要 |
PURPOSE:To improve both of an anti-oxidation property and a dispersion property towards the magnetic metal powder of a high specific surface area, by giving surface treatment to the magnetic metal powder of iron or mainly composed of iron with a phenol compound wherein a p-position is replaced by aliphatic hydrogen carbide having a specific carbon number. CONSTITUTION:Surface it to give surface treatment to magnetic metal powder by a normal method with the phenol compound, wherein a p-position is replaced with aliphatic hydrogen carbide having a carbon number 4-12, being desirable to dip magnetic metal powder in a treatment liquid wherein the phenol compound is dissolved or dispersed in an aromatic organic solvent. The phenol compounds for being used are p-tert-butyl phenol, p-n-hexyl phenol, p-n-octyl phenol and p-n-dodecyl phenol. It is good to use 3-5wt.% of these phenol compounds to the weight of the surface-treated magnetic metal powder. Thereby, the magnetic metal powder having the remarkably improved anti-oxidation and dispersion property can be obtained. |
