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Base-Catalyzed Silica Gels: Structure and Chemistry

Published online by Cambridge University Press:  28 February 2011

Garry J. Garvey  and
Bruce E. Smith
Garry J. Garvey
Affiliation:
AKZO Chemicals Inc., Livingstone Ave., Dobbs Ferry, NY 10522.
Bruce E. Smith
Affiliation:
AKZO Chemicals Inc., Livingstone Ave., Dobbs Ferry, NY 10522.
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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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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 223
Copyright
Copyright © Materials Research Society 1990

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References

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