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SiO2-TiO2-ZrO2 Gel Glasses - Reaction Kinetics and Properties

Published online by Cambridge University Press:  21 February 2011

W. Beier  and
G. H. Frischat
W. Beier
Affiliation:
Technical University Clausthal, Institut für Nichtmetallische Werkstoffe, Professur für Glas, 3392 Clausthal-Zellerfeld, Federal Republic of Germany
G. H. Frischat
Affiliation:
Technical University Clausthal, Institut für Nichtmetallische Werkstoffe, Professur für Glas, 3392 Clausthal-Zellerfeld, Federal Republic of Germany
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Abstract

Solutions have been prepared containing silicon ethoxide, titanium butoxide, and zirconium propoxide as metal organic compounds. Additions of water (for hydrolysis), solvents (ethanol, formamide), and hydrochloric acid (as a catalyst) have been varied systematically. The reaction kinetics of the hydrolysis and condensation steps in these mixtures have been studied by measuring viscosity and 29Si NMR data as a function of time. After gelling, the products have been dried and then converted to glassy materials by firing. Temperatures well below 1000 °C have been used for that. Glasses from the title system have been obtained both in bulk and in thin film form. Properties like density, specific surface, and hardness have been investigated and are reported as well.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 155: Symposium L – Processing Science of Advanced Ceramics , 1989 , 103
Copyright
Copyright © Materials Research Society 1989

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References

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