Porous alumina membranes obtained by sol-gel techniques

Porous alumina membranes prepared by a sol-gel process, using aluminum isopropylate as precursors, were characterized by XRD, SEM, TEM, TG and DTA. It showed the mean pore diameter and the membrane thickness could reach tens of nanometers (nm), 3 micron (micrometer) respectively. The conditions of hydrolysis of aluminum isopropylate, processing sol to gel and the influences of heating on forming alumina membrane have been studied.