RBAO membranes/catalyst supports with enhanced permeability

Conducting the RBAO process through the liquid-gas reaction regime could be an appropriate route to produce alumina membranes/supports. Such ceramic structures have a larger permeability compared to conventional alumina membranes and, at the same time, do posses high flexural strength. The initial Al content in the Al/Al2O3 mixture powder to be milled strongly affects permeability (negative), flexural strength (positive) and, to a lesser extent, porosity (negative) of the fired samples. Oxidation during milling is low (<6 wt.%), but strongly depends on the initial Al content.