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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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The partial ionic and electronic conductivity of Y-containing and Y-free chromia scales

Liu, H. and Lyon, S.B. and Stack, M.M. (2001) The partial ionic and electronic conductivity of Y-containing and Y-free chromia scales. Oxidation of Metals, 56 (1-2). pp. 147-161. ISSN 0030-770X

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Abstract

This work reports on the ionic and electronic partial conductivity, determined in situ by the Wagner asymmetry-polarization technique, of chromia scales thermally grown in 1 atm flowing oxygen at 900°C. Results show an activation energy of 0.3 eV for ionic conductivity and of 0.6 eV for electronic conductivity in the temperature range 300-700°C. After treatment with yttria, both the ionic and electronic conductivity were reduced; however, the activation energy was the same as the Y-free scales. This is consistent with previous results obtained from chromia scales grown in H2/H2O vapor. Comparison of the data between scales grown at low and high PO2 suggests that hydrogen doping in the scale can reduce both ionic and electronic conductivity by approximately one order of magnitude.