Patent ID: 6521016
Filing Date: 2003-02-18
Classification: B22F,B82Y,Y10S

Abstract:
A method of producing nanophase Cuâ€”Al2O3 composite powder, comprising:(i) preparing a water-base solution by dissolving Cu-nitrate and Al-nitrate in amounts corresponding to a final target composition for Cuâ€”Al2O3 composite powder; (ii) producing a precursor powder having a molecular scale mixture of Cu, Al, NO3â€”groups and moisture by spray drying the prepared water-based solution; (iii) producing a desalted powder by removing volatile components of NO3 groups and partially reabsorbed moisture by heat-treatment in air atmosphere, and simultaneously producing nanophase CuOâ€”Al2O3 composite powder by oxidation of corresponding metal components; and (iv) synthesizing nanophase Cuâ€”Al2O3 composite powder by reduction heat treatment of CuO within the desalted powder in a reducing atmosphere.