Interpretation of mercury porosimetry applied to aerogels
- 1 August 1995
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 10 (8), 2114-2119
- https://doi.org/10.1557/jmr.1995.2114
Abstract
The observation of aerogels submitted to a pressure of mercury indicates that this porous material is compacted and not intruded by the mercury. Consequently, the classical Washburn equation cannot be applied. A relation is established between the pressure P of compaction and the size L of the largest pores. The size of pores is estimated by using the nitrogen adsorption-desorption isotherms analysis and SEM measurements. A relation is found in which P is proportional to L−4 The new relation is applied to mercury porosimetry. Finally, a mechanical model is proposed that reproduces successfully the behavior of aerogels under high pressure of mercury.Keywords
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