Fractal geometry change induced by compression densification

Texture change induced by an isostatic compression of low density aerogels exhibiting fractal geometry has been investigated. Fractal features are analyzed from small angle X-ray scattering experiments. It was found that at the onset of densification a decrease in the correlation length occurs while...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1998-11, Vol.241 (1), p.38-44
Main Authors: Beurroies, I., Duffours, L., Delord, P., Woignier, T., Phalippou, J.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
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Summary:Texture change induced by an isostatic compression of low density aerogels exhibiting fractal geometry has been investigated. Fractal features are analyzed from small angle X-ray scattering experiments. It was found that at the onset of densification a decrease in the correlation length occurs while the fractal dimension increases a little. Isostatic compression leads to cluster interpenetration. This provoked solid arm entanglement modifies the fractal range of cluster. For higher pressures correlation length does not change indicating that the cluster size is constant. Further densification has been related to the collapse of pores located between clusters.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(98)00748-0