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Tetraethylorthosilicate (Teos)

Published online by Cambridge University Press:  15 February 2011

L. C. Klein  and
G. J. Garvey
L. C. Klein
Affiliation:
Rutgers-The State University of New Jersey, Ceramics Department, P.O. Box 909, Piscataway, NJ 08854
G. J. Garvey
Affiliation:
Room 12-007, MIT, Cambridge, MA 02139
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Abstract

Two series of gels were prepared by hydrolyzing TEOS with HCl or NH4OH catalyst. In the first series, the molar ratio of water to TEOS was 4:1 and the catalyst addition was (1 × 10−3), (4 × 10−3), (1 × 10−2), (4 × 10−2), and (1 × 10−1). In the second series, the catalyst addition was (1 × 10−3) moles and the molar ratio of water to TEOS was 2:1, 4:1, 8:1, 16:1, and 32:1. Dried samples were characterized for surface area, porosity and C and H content. Samples were heated to 800°C and thermogravimetric weight loss was recorded. Both HCl and NH4OH are catalysts for hydrolysis, but during polymerization, the relative rates of hydrolysis and condensation determine resulting dried microstructures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 32: Symposium B – Better Ceramics Through Chemistry I , 1984 , 33
Copyright
Copyright © Materials Research Society 1984

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References

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