Method of producing nanophase Cu-Al2O3 composite powder

摘要

The present invention relates to a method of producing nanophase Cu—Al₂O₃ composite powder by means of 1) the producing precursor powders by centrifugal spray drying process using the water base solution, in which Cu-nitrate (Cu(NO₃)₂3H₂O) and Al-Nitrate (Al(NO₃)₃9H₂O) are solved to the point of final target composition (Cu-1 wt %/Al₂O₃),2) the heat treatment process (desaltation process) at the 850° C. for 30 min in air atmosphere to remove the volatile components such as the moisture and NO₃ group in precursor powder and simultaneously to synthesize the nano CuO—Al₂O₃ composite powders by the oxidation of corresponded metal components and 3) the reduction heat treatment of CuO at 200° C. for 30 min in reducing atmosphere to produce the final nanophase Cu—Al₂O₃ composite powders with the size below 20 nm.