Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-10T08:59:02.206Z Has data issue: false hasContentIssue false
  • English
  • Français

Growth and Structure of Alumino-Silicate Polymers

Published online by Cambridge University Press:  25 February 2011

J. P. Boilot ,
J. C. Pouxviel ,
A. Dauger  and
A. Wright
J. P. Boilot
Affiliation:
Groupe de Chimie du Solide, Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique, 91128 Palaiseau Cedex, (FRANCE)
J. C. Pouxviel
Affiliation:
Groupe de Chimie du Solide, Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique, 91128 Palaiseau Cedex, (FRANCE)
A. Dauger
Affiliation:
Ecole Nationale Supérieure de Céramique Industrielle, 87065 Limoges Cedex, (FRANCE)
A. Wright
Affiliation:
Institut Laue-Langevin, 156X. 38042 Grenoble Cedex, (FRANCE)
Get access

Abstract

Gels have been prepared in the H2O, HOiPr, (BuO)2Al-O-Si(OEt)3 ternary phase diagram in a large range of oxide concentrations. The gelation time is governed by the initial water concentration, showing that the hydrolysis of Si-OR groups is the rate-determining process for the gelation.

The structure of clusters and the kinetics of aggregation have been studied by SANS. We observe mass-fractal particles characterized by a fractal dimension of 1.9, in agreement with the existence of a cluster-cluster aggregation mechanism during the gelation. The scattering curves exhibit a maximum intensity corresponding to interparticle correlations due to purely excluded-volume effects.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 121
Copyright
Copyright © Materials Research Society 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Pouxviel, J.C., Boilot, J.P., Dauger, A., Hubert, L. in Better Ceramics Through Chemistry II. edited by Brinker, C. J., Clark, D.E. and Ulrich, D.R., (Mater. Res. Soc. Proc. 71, Palo Alto, 1986) pp. 269–74.Google Scholar
2. Pouxviel, J.C. and Boilot, J.P., in Ultrastructure Processing of Ceramics. Glasses and Compositesr San Diego Feb. 1987, in press.Google Scholar
3. Pouxviel, J.C., Boilot, J.P., Poncelet, O., Hubert, L.G., Lecomte, A., Dauger, A. and Beloeil, J.C., J. Non-Cryst. Solids, 93, 277 (1987).Google Scholar
4. Pouxviel, J.C., Boilot, J.P., Lecomte, A. and Dauger, A., J. Physique (Paris) 48, 921 (1987).CrossRefGoogle Scholar
5. Schaeffer, D.W. and Keefer, K.D. in Better Ceramics Through Chemistryl. edited by Brinker, C.J., Clark, D.E. and Ulrich, D.R., (Mater. Res. Soc. Proc. 12., 1984) pp.1–14 Google Scholar
6. Kolb, M., Botet, R. and Juliién, R., J. Phys. Lett. 45, L211 (1984).Google Scholar