Picture of virus under microscope

Research under the microscope...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

Explore SIPBS research

Structure, conductivity and redox stability of solid solution Ce1-xCaxVO4 (0 0.4125)

Petit, Christophe T. G. and Lan, Rong and Cowin, Peter I. and Kraft, Arno and Tao, Shanwen (2011) Structure, conductivity and redox stability of solid solution Ce1-xCaxVO4 (0 0.4125). Journal of Materials Science, 46 (2). pp. 316-326. ISSN 0022-2461

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

A-site-substituted cerium orthovanadates, Ce1-x CaxVO4, were synthesised by solid-state reactions. At room temperature, the solid solution limit in Ce1-xCaxVO4 series is at x = 0.4125. The crystal structure was analysed by X-ray diffraction and it exhibits a tetragonal zircon structure of space group I4(1)/amd with a = 7.4004 (1) and c = 6.4983 (6) angstrom for CeVO4. The UV-Visible absorption spectra indicated that the compounds have band gaps at room temperature in the range of 4.2-4.5 eV. Conductivity measurements were performed for the first time up to the calcium solid solution limit in both air and dry 5% H-2/Ar with conductivity values at 600 degrees C ranging from 0.3 to 20 mS cm(-1) in air to 3 to 30 mS cm(-1) in reducing atmosphere. In general, the conductivity of Ca-doped CeVO4 is higher in air but lower in a reducing atmosphere comparing to pure CeVO4. The H-2/air electrochemical cell measurement indicates that the conduction of sample Ce0.7Ca0.3VO4 is electronic dominant. Samples Ce0.9Ca0.1 VO4 and Ce0.8Ca0.2VO4 are redox stable at a temperature below 600 degrees C although the conductivity is not high enough to be used as an electrode for solid oxide fuel cells.