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NMR Characterization of Precursors to Chemically Derived Ceramics

Published online by Cambridge University Press:  25 February 2011

John D. Basil  and
Chia-Cheng Lin
John D. Basil
Affiliation:
PPG Industries, Inc., Glass Research and Development, P.O. Box 11472, Pittsburgh, PA, 15238
Chia-Cheng Lin
Affiliation:
PPG Industries, Inc., Glass Research and Development, P.O. Box 11472, Pittsburgh, PA, 15238
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Extract

High resolution 29Si NMR spectroscopy has been used to study the hydrolysis and condensation reactions of TEOS and related silicon alkoxides under a range of conditions selected to model initial steps in the formation of ceramic precursors. Kinetic results have led to a detailed description of the role of various reaction parameters and to differences in reactivity of various polyethoxysiloxanes. Reactivity studies have provided insight into the processes that form multicomponent alkoxide/oxide materials. Titanium alkoxides in particular can act as catalysts for silanol condensation in addition to forming Si-O-Ti linkages, and the former role may predominate in certain systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 49
Copyright
Copyright © Materials Research Society 1988

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References

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