| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel powder preferably used for producing an inner electrode of a stacked ceramic capacitor, and to provide a production method therefor. SOLUTION: This production method comprises the steps of: preparing an alkaline colloidal solution formed of a dispersive colloidal solution of Pd and Ag, a reducing agent and an alkaline substance; and adding an aqueous solution of a Ni salt into the colloidal solution to produce Ni particles. A Pd content in the colloidal solution is controlled into 10 to 500 mass ppm, an Ag content into 0.1 to 5 mass ppm, and a content of a protective colloidal agent into 0.02 to 1 mass% each with respect to an amount of Ni in the aqueous solution of the Ni salt. These contents can be further reduced by controlling a mass ratio of Pd, Ag and the protective colloidal agent into a predetermined range. The production method provides a spherical nickel powder which has a small average particle diameter, a uniform particle size distribution and adequate dispersibility, and contains few coarse particles. COPYRIGHT: (C)2007,JPO&INPIT |
