Study of porous texture of silica and silica-alumina hydrogels using experimental design theory

The porous texture of silica and silica-alumina hydrogels has been studied by thermoporometry. The strategy of experimental design theory has been employed to demonstrate the important effect of temperature, pH, silica content of the silica hydrogel and alumina ratio. The existence of interactions b...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1992, Vol.147, p.141-145
Main Authors: Dessalces, G., Biay, I., Kolenda, F., Quinson, J.F., Reymond, J.P.
Format: Article
Language:English
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Summary:The porous texture of silica and silica-alumina hydrogels has been studied by thermoporometry. The strategy of experimental design theory has been employed to demonstrate the important effect of temperature, pH, silica content of the silica hydrogel and alumina ratio. The existence of interactions between the variables is revealed. The most important parameters correspond to those able to increase the gelation rate which leads to an open texture. A large opening of the porosity can be observed with alumina addition to the silica hydrogel.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(05)80607-6