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Vapogel-A new Glass Formation Technique

Published online by Cambridge University Press:  25 February 2011

James W. Fleming  and
Sandra A. Fleming
James W. Fleming
Affiliation:
AT&T Bell Laboratories, 600 Mountain Avenue, Murray Hill, N.J. 07974
Sandra A. Fleming
Affiliation:
AT&T Bell Laboratories, 600 Mountain Avenue, Murray Hill, N.J. 07974
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Abstract

SiCI4 was tested in both the liquid and vapor state for its suitability as a monolithic gel precursor. Samples with molar ratios of H2O/SiCl4 ranging from 4 to 400 were investigated. Several advantages of using SiCl4 over the classic organometallics such as tetraethylorthosilicate and tetramethylorthosilicate were observed. Gelation of the SiCl4-H2O sol is more rapid. Also, greater purity is achieved with SiCl4 vapor as the starting material. In addition to the SiCl4 experiments, GeCl4 was also investigated as both a dopant and in the pure state for its gelation characteristics. Higher dopant concentrations were achieved using this technique than are possible with other monolithic gel methods, but pure GeO2 gels were not formed. The gel made by the vapor phase method has been named vapogel.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 673
Copyright
Copyright © Materials Research Society 1988

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References

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