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The Role of Water in Densification of Gels

Published online by Cambridge University Press:  15 February 2011

T. A. Gallo ,
C. J. Brinker ,
L. C. Klein  and
G. W. Scherer
T. A. Gallo
Affiliation:
Rutgers University, Ceramics Dept. Piscataway, NJ,
C. J. Brinker
Affiliation:
Sandia National Laboratories, Albuquerque, NM,
L. C. Klein
Affiliation:
Rutgers University, Ceramics Dept. Piscataway, NJ,
G. W. Scherer
Affiliation:
Corning Glass Works, Corning, NY
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Abstract

The densification behavior of a gel-derived borosilicate glass was studied. Surface area, thermal gravimetric and infrared measurements were used to calculate the surface hydroxyl coverage as a function of time at several temperatures. Application of a viscous sintering model to the isothermal shrinkage data showed viscosity to increase isothermally by almost two orders of magnitude at the lowest investigated temperature. Although most of this increase is attributable to increased crosslinking accompanying dehydroxylation, structural relaxation was also shown to significantly affect the densification kinetics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 32: Symposium B – Better Ceramics Through Chemistry I , 1984 , 85
Copyright
Copyright © Materials Research Society 1984

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References

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