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Base-Catalyzed Silica Gels: Structure and Chemistry

  • Garry J. Garvey (a1) and Bruce E. Smith (a1)

Abstract

The chemical and physical properties of two base-catalyzed silica gels systems were characterized. The sol-gel transition was studied by titration, rheometry, and NMR. Pyrolysis behavior was monitored by TGA and mass spectroscopy. Many characteristics were strikingly similar for the two base-catalyzed systems. However ammonium hydroxide additions resulted in heterogeneities at lower concentrations than ammonium carbonate. Ammonium carbonate enhanced oxidation on pyrolysis.

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Base-Catalyzed Silica Gels: Structure and Chemistry

  • Garry J. Garvey (a1) and Bruce E. Smith (a1)

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