COPPER-ALUMINA MATERIALS MADE BY INFILTRATION IN BOEHMITE

New materials were made by infiltration of sol-gel boehmite thin films with copper acetate. The structure and phase transformation of these materials during heat treatment were studied. It was found that infilt ration in the boehmite state did not end up in the same material as di rect infiltration in the theta-alumina derived from boehmite, even aft er both types of materials were heat-treated at 900 degrees C. Infiltr ation in boehmite makes it possible to synthesize sandwich structures comprised of alternate layers of CuO and of gamma-alumina.