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New Al2O3 Membranes and Catalyst Substrates: Nanoporous Alumina and Corundum for Ultra- and Microfiltration

: Krell, A.; Ma, H.-W.; Buse, F.


European Ceramic Society:
European Ceramic Society. Proceedings the 7th Conference and Exhibition. Part 3 : Brugge, Belgium, September 9 - 13, 2001, seventh ECerS
Uetikon-Zürich: Trans Tech Publications, 2002 (Key engineering materials 206/213)
ISBN: 0-87849-882-6
European Ceramic Society (Conference and Exhibition) <7, 2001, Brügge>
Euro-Ceramics (ECerS) <7, 2001, Brügge>
Conference Paper
Fraunhofer IKTS ()
porous ceramic membrane; nanofiltration; ultrafiltration; microfiltration; ceramic membrane; ceramic catalyst substrate; poröse Keramik; keramische Membran; Katalysatorsubstrat; Al2O3; alumina ceramic; catalyst

Ceramic membranes and coatings on metal substrates are provided consting of pure corundum with pore sizes 10-300 nm. The pore size of alumina nanofiltration membranes is > 0.8 nm. Highly defect-free microstructures improve separation limits and the strength when sol/gel approaches are replaced by nanopowder processing. Associated with a new synthesis that avoids the intermediate formation of platelet-shaped boehmite, equiaxed constituent particles give rise to an improved permeability of the porous microstructures.