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A Comparison of Tio2-Sio2 Aerogels and Xerogels

Published online by Cambridge University Press:  28 February 2011

G. Cogliati ,
M. Guglielmi ,
T.M. Che  and
T.J. Clark
G. Cogliati
Affiliation:
TEMAV, Laboratori di Medicina, Bologna, Italy.
M. Guglielmi
Affiliation:
Universita di Padova, Dipartimento di Ingegneria Meccanica, Padova, Italy.
T.M. Che
Affiliation:
Enimont America Inc., Advanced Materials Department, Monmouth Junction, N.J. 08852
T.J. Clark
Affiliation:
Enimont America Inc., Advanced Materials Department, Monmouth Junction, N.J. 08852
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Abstract

Titania-silica gels containing up to 30% titania have been obtained from silicon and titanium alkoxides and from silicon alkoxides and TiCl4. These gels were then processed by normal drying and by hypercritical methods. The thermal evolution of these gel/glass systems, specifically with respect to crystallization behavior has been followed using x-ray diffraction and Raman spectroscopy. From these studies, it was found that not only the different chemistries, but also the different processing methods significantly affect the microstructure of these titania-silica systems.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 329
Copyright
Copyright © Materials Research Society 1990

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References

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