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Polymeric alumino-silicate gel obtained by hydrolytic polycondensation from metal salts of alumina and alkoxide sol of silica is a suitable method for mullite processing. In this work were investigated the effects of the processing variables (dilution, pH, gelling temperature and water content) on the mullite formation. Monophasic gel was synthesized from aluminium nitrate nanohydrate dissolved in...
The effect of α-alumina seed particles on the densification and microstructure development of the sol-gel derived alumina-zirconia composites has been studied. The alumina-zirconia sols have been prepared from two different alumina sols (polymer and particulate) and two different types of zirconia particles. Addition of the seed particles decreases the θ to α-alumina transformation temperature by...
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