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Chemically enhanced thermal stability of anodized nanostructured zirconia membranes

Choudhury, Tanushree H and Rajamathi, Michael and Raghavan, Srinivasan (2012) Chemically enhanced thermal stability of anodized nanostructured zirconia membranes. In: Journal of Materials Chemistry, 22 (14). pp. 6885-6893.

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Anodized nanotubular and nanoporous zirconia membranes are of interest for applications involving elevated temperatures in excess of 400 degrees C, such as templates for the synthesis of nanostructures, catalyst supports, fuel cells and sensors. Thermal stability is thus an important attribute. The study described in this paper shows that the as-anodized nanoporous membranes can withstand more adverse temperature-time combinations than nanotubular membranes. Chemical treatment of the nanoporous membranes was found to further enhance their thermal stability. The net result is an enhancement in the limiting temperature from 500 degrees C for nanotubular membranes to 1000 degrees C for the chemically treated nanoporous membranes. The reasons for membrane degradation on thermal exposure and the mechanism responsible for retarding the same are discussed within the framework of the theory of thermal grooving.

Item Type: Journal Article
Publication: Journal of Materials Chemistry
Publisher: Royal Society of Chemistry
Additional Information: Copyright of this article belongs to Royal Society of Chemistry.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 18 May 2012 09:08
Last Modified: 18 May 2012 09:10
URI: http://eprints.iisc.ac.in/id/eprint/44417

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