Compressing some sol-gel materials and reduces their stiffness: a textural analysis

The mechanical behaviour of two series of silica and of resorcinol xerogels is analyzed by mercury porosimetry. The data are expressed as pressure-density curves, which enables textural information to be obtained. In particular, it is shown that some of the analyzed samples exhibit a marked lowering...

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Hauptverfasser:	Gommes, C.J., Job, N., Blacher, S., Pirard, J.-P.
Format:	Buchkapitel
Sprache:	eng
Schlagworte:	Catalysis Chemistry Chimie Engineering, computing & technology Ingénierie, informatique & technologie Materials science Materials science & engineering Physical, chemical, mathematical & earth Sciences Physique, chimie, mathématiques & sciences de la terre Science des matériaux & ingénierie
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Beschreibung
Zusammenfassung:	The mechanical behaviour of two series of silica and of resorcinol xerogels is analyzed by mercury porosimetry. The data are expressed as pressure-density curves, which enables textural information to be obtained. In particular, it is shown that some of the analyzed samples exhibit a marked lowering of their mechanical stiffness upon compression. This observation is analyzed in terms of the collapse of the sample's porosity and of the heterogeneity of the microstructure.
ISSN:	0167-2991
DOI:	10.1016/S0167-2991(07)80026-7