Abstract
This paper discusses the physical-chemical properties of γ-Al 2O 3 and TiO 2 ceramic membranes which have been prepared by sol-gel techniques from alkoxide starting materials. Mean pore size and pore size distributions are examined using N 2 sorption analysis. Particle size of sols as measured by in situ quasi-elastic light scattering is compared with SEM analysis of sintered membranes. Crack-free unsupported monoliths with thicknesses up to 120 μm have been prepared of γ-Al 2O 3. Supported TiO 2 membranes have been fabricated with thicknesses up to 0.5 μm. The γAl 2O 3 membranes are obtained from “particulate” sols, while for TiO 2 both “particulate” and “polymeric” sols have been used to produce membranes.
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