Regensburg 2002 – wissenschaftliches Programm
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DS: Dünne Schichten
DS 27: Postersitzung
DS 27.39: Poster
Dienstag, 12. März 2002, 15:30–17:30, Poster Physik B
Sputtered silver films on top of porous alumina supports: Correlation between deposition parameters, microstructure and gas permeability. — •Angela Büttner1, Klaus Rätzke1, Vladimir Zaporojtchenko1, Thomas Strunskus2, Helmut Kamusewitz3 und Franz Faupel1 — 1Technische Fakultät der Christian-Albrechts-Universität zu Kiel, Lehrstuhl für Materialverbunde, Kaiserstr. 2, 24143 Kiel — 2Fakultät für Chemie der Ruhr-Universität Bochum, Physikalische Chemie I, Universitätsstr. 150, 44780 Bochum — 3Insitut für Chemie des GKSS-Forschungszentrums, Abteilung für Membranforschung Teltow, Kantstr. 55, 14513 Teltow-Seehof
Gas separation by metallic membranes is a promising route to overcome some of the well-known difficulties of conventional polymer-membranes e.g. the low selectivity regarding to oxygen/nitrogen. For the economic employment of such a metallic membrane it is crucial to optimize the flux through the membrane without losing the high selectivity and also retaining a sufficiently high mechanical stability. To achieve this very thin metal films acting as separation layers are deposited onto porous substrates. The present work deals with the preparation of thin silver films supported by porous alumina substrates and especially focuses on the correlation between varying deposition parameters, microstructure (grain size, orientation of crystallites) and gas permeability at room temperature. Characterization methods are SEM, XRD, AFM and a modified leak test.