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The Influence of Cations on Growth Kinetics of Silica Aggregates

Published online by Cambridge University Press:  28 February 2011

Theo P.M. Beelen ,
Peter W.J.G. Wijnen ,
Kees P.J. Rummens  and
Rutger A. Van Santen
Theo P.M. Beelen
Affiliation:
Lab. Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O.Box 513, 5600 MB EINDHOVEN, The Netherlands.
Peter W.J.G. Wijnen
Affiliation:
Lab. Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O.Box 513, 5600 MB EINDHOVEN, The Netherlands.
Kees P.J. Rummens
Affiliation:
Lab. Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O.Box 513, 5600 MB EINDHOVEN, The Netherlands.
Rutger A. Van Santen
Affiliation:
Lab. Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O.Box 513, 5600 MB EINDHOVEN, The Netherlands.
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Abstract

Silica gels are prepared by acidification (pH = 2 − 4) of water glass. SAXS measurements show that the gel consists of fractal aggregates (D = 2.2). Although the fractal dimension is not influenced by addition of cations, Al3+ and Mg2+ retard the growth of the fractal aggregates, while TMA+ has a promoting effect.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 273
Copyright
Copyright © Materials Research Society 1990

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References

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