| 摘要 |
PURPOSE:To obtain titled powder suitable for conductive pigment etc. by suspending mica powder in an aqueous solution of palladium chloride of specific pH value to perform activation treatment through manipulation of the pH value of the system so that the surface of said powder is coated with palladium followed by carrying out a electroless plating. CONSTITUTION:Mica powder is suspended in an aqueous solution of palladium chloride with a pH <=2; alternatively, mica powder is suspended in an aqueous solution of palladium chloride followed by adjusting the pH value of the system to <=2. After that, an activation treatment is carried out spending enough time, while raising the pH of the medium to 4-7, to form uniform coating film of palladium on the surface of said powder. The resulting activated mica powder is subjected to electroless plating using a nickel compound, thus obtaining the objective powder.
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