Tietz, F. and Arulraj, I. and Stover, D. (2006) Statistical design of experiments for evaluation of Y-Zr-Ti oxides as anode materials in solid oxide fuel cells. British Ceramic Transactions, 103 (5). pp. 202-210. ISSN 0967-9782

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Mixed conducting anode materials for solid oxide fuel cells are desirable in order to extend the electron transfer reaction zone for fuel gas conversion and to minimise the nickel content for achieving a redox stable anode. Partial substitution by titania in yl/ria stabilised zirconia (YSZ) is known to increase the electronic conductivity in reducing atmospheres. Nine different compositions were selected /rom the quasi ternary phase diagram according to principles used in statistical design of experiments covering the whole stoichiometric regime relevant for ionic applications. The dc electrical conductivity values increase strongly with high Ti contents under reducing (Ar-4%H2 ) conditions, whereas they decrease continuotlsly with increasing Ti content under oxidising conditions (air). The results clearly show that the chosen screening process for materials selection can considerably reduce thenumber ofsamples. Forsolidoxidefilelcellanodes, the compositions in the Y01 s-ZrOr TiD2 system should be restricted to low Ti contents.

Item Type: Article
Uncontrolled Keywords: Eleetrical properties; Fuel cells; Statistical design ofexperiments; YO1.5-ZrO2-TiO2 phase diagram
Subjects: Fuel Cells
Depositing User: ttbdu cecri
Date Deposited: 06 Apr 2012 15:16
Last Modified: 06 Apr 2012 15:16
URI: http://cecri.csircentral.net/id/eprint/890

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