Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-29T07:44:21.685Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Aelion, R., Loebel, A. and Eirich, F., Am. Chem. Soc. 72 (1950) 5705–5712.CrossRefGoogle Scholar
2. Brinker, C. J. et al. , J. Non-Crystal. Solids 48 (1982) 47–64.CrossRefGoogle Scholar
3. Brinker, C. J. et al. , J. Non-Crystal. Solids (1983) to be published.Google Scholar
4. Klein, L. C. and Garvey, G. J., Am. Chem. Soc. Ind. Eng. Chem. No. 194 Symposium (1982) Chapter 18.Google Scholar
5. Kamiya, K., Sakka, S. and Mizutani, M., Yogyo Kyokai Shi 86 (1978) 553–559.CrossRefGoogle Scholar
6. Nogami, M. and Moriya, Y., J. Non-Crystal. Solids 37 (1980) 191–201.CrossRefGoogle Scholar
7. Yu, P., Liu, H. and Wang, Y., J. Non-Crystal. Solids 52. (1982) 511–520.CrossRefGoogle Scholar
8. LaCourse, W. C. et al. , J. Canadian Ceramic Soc. (1984) to be published.Google Scholar
9. Keefer, K. D.. This volume.Google Scholar
10. Iler, R., The Chemistry of Silica, John Wiley and Sons, Inc. 1979.Google Scholar
11. Brinker, C. J. and Scherer, G. W., Submitted to J. Non-Crystal. Solids, 1983.Google Scholar
12. Klein, L. C. and Garvey, G. J., Ultrastructure Processing, John Wiley and Sons (1984).Google Scholar