Abstract
The mixtures of aluminum s-butoxide, titanium tetra-butoxide and tetraethyl orthosilicate in different molar ratio were hydrolyzed in aqueous alcohol. The precipitates were dried, and the growth and transformation of the crystals at calcination were estimated by means of an X-ray diffractometer. The surface properties of the oxide powders were studied by heat of immersion and adsorption of nitrogen and water vapor. The surface hydrophilicity was calculated as dependent on the ratio of the hydrophilic surface area determined by water vapor adsorption to the total area determined by nitrogen adsorption. The variation in the heat of immersion and in the surface hydrophilicity in accordance with the composition of the material has been discussed.
