Patent ID: 6503560
Filing Date: 2003-01-07
Classification: B22F,C22C,H01G,Y10T

Abstract:
A method for preparing composite nickel fine powder comprising the steps of:adding an aqueous solution containing at least one member selected from the group consisting of water-soluble salts of metal elements each having an atomic number of 82 or ranging from 12 to 56 and belonging to Group 2 to 14 of the Periodic Table to a slurry containing metal nickel fine particles or metal nickel fine particles whose surface is oxidized; then adjusting the pH of the mixture with an acid or an alkali to thus temporarily carry the metal oxide and/or the metal complex oxide derived from the water-soluble salt on the surface of the metal nickel fine particles; washing and drying the particles to obtain dry particles; and colliding the dry metal nickel fine particles carrying the metal oxide and/or the metal complex oxide adhered thereto with each other or other objects to thus carry the metal oxide and/or the metal complex oxide on the surface of the metal nickel fine particles.