A stable mixture of partially condensed polysilicates is formed from the substoichiometric, acid catalysed hydrolysis of tetramethoxysilane [Si(OCH3)4] and the removal of the reaction- generated methanol by distillation. This mixture has been used as a precursor to make silica aerogels that show microstructural differences from base catalysed TMOS aerogels. In this paper, we report the analysis of this mixture for a determination of the type and distribution of the polysilicate species formed, and we include measurements of some physical properties of this fluid.
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Tillotson, T.M., Hrubesh, L.W. Characterization Of Partially Condensed Silica Formed From The Partial Hydrolysis Of Tmos. MRS Online Proceedings Library 180, 309 (1990). https://doi.org/10.1557/PROC-180-309