Dresden 2011 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 40: Nanomaterials III

MM 40.5: Talk

Thursday, March 17, 2011, 17:15–17:30, IFW B

Elastic properties and deformation of mesoporous glass during sorption of argon — •Klaus Schappert and Rolf Pelster — Universität des Saarlandes, FR 7.2 Experimentalphysik, Campus E2.6, 66123 Saarbrücken, Germany

Sorption of atoms or molecules in porous matrices can induce stress and thus a noteworthy deformation of the material. Here, we present measurements of the length change of mesoporous Vycor glass during isothermal adsorption and desorption of argon both above and below its freezing point. We compare the behaviour of this macroscopic length change with the elastic properties of the adsorbed argon, that we evaluate via ultrasonic measurements. Thereby, we are able to relate the deformation of the porous sample to the microstructure of the adsorbate.