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Preparation of Homogeneous Aluminosr, Icate Gels by sol/gel Methods

Published online by Cambridge University Press:  25 February 2011

M. E. Reese ,
A. V. Mccormick  and
J. Sanchez
M. E. Reese
Affiliation:
University of Minnesota, 421 Washington Avenue, Minneapolis, MN 55455
J. Sanchez
Affiliation:
University of Minnesota, 421 Washington Avenue, Minneapolis, MN 55455
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Abstract

The factors affecting the production of homogeneous aluminosilicate gels from alkoxide precursors were investigated. Aluminosilicate gels were made in acidic conditions with a prepolymerization of the silicate precursor followed by the addition of the alumina precursor.

Confirming earlier studies, we found that the gel homogeneity is increased when the rate of gelation decreases. The reduction of the water content and/or the aluminum precursor, and more surprisingly the increase of the acid concentration contributed to the gel time increase and thus the gel homogeneity improvement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 249: Symposium Q – Synthesis and Processing of Ceramics: Scientific Issues , 1991 , 69
Copyright
Copyright © Materials Research Society 1992

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References

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