Patent ID: 6914032
Filing Date: 2005-07-05
Classification: B22F,C01G,C01P,Y10T

Abstract:
1. A method of producing a tungsten-copper based composite powder, comprising: (a) preparing a composite oxide powder by dissolving a water-soluble tungsten salt, and a salt containing copper in water, followed by spray-drying the resulting mixture and calcining the resulting spray dried mixture; (b) preparing a tungsten oxide powder by calcining a salt containing tungsten; (c) forming an ultra-fine tungsten-copper based composite oxide powder by mixing 20˜75 wt % of the composite oxide powder with 80˜25 wt % of the tungsten oxide powder, followed by ball-milling the tungsten-copper based composite powder-tungsten oxide powder mixture; and (d) reducing the ultra-fine tungsten-copper based composite oxide powder.