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Structure and conductivity of strontium-doped cerium orthovanadates Ce1- xSrxVO4 (0 0.175)

Petit, Christophe T. G. and Lan, Rong and Cowin, Peter I. and Tao, Shanwen (2010) Structure and conductivity of strontium-doped cerium orthovanadates Ce1- xSrxVO4 (0 0.175). Journal of Solid State Chemistry, 183 (6). pp. 1231-1238. ISSN 0022-4596

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Abstract

A-site substituted cerium orthovanadates, Ce1-xSrxVO4, were synthesised by solid-state reactions It was found that the solid solution limit in Ce1-xSrxVO4 is at x = 0 175. The crystal structure was analysed by X-ray diffraction and it exhibits a tetragonal zircon structure of space group I4(1)/amd (1 4 1) with a = 7 3670 (3) and c = 6.4894 (1) angstrom for Ce0 825Sr0 175VO4 The UV-vis absorption spectra indicated that the compounds have band gaps at room temperature in the range 4.5-4 6 eV Conductivity measurements were performed for the first time up to the strontium solid solution limit in air and in dry 5% H-2/Ar with conductivity values at 600 degrees C ranging from 03 to 30 mS cm(-1) in air to 30-45 mS cm(-1) in reduced atmosphere Sample Ce0 825Sr0 175VO4 is 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.

Item type: Article
ID code: 34079
Keywords: Ce1-xSrxVO4, conductivity, solid solution, cerium orthovanadates, crystal structure, redox behavior, oxides, CEVO4, CA, SR, transport, stability, vanadates, TB, Chemical engineering, Materials Chemistry, Ceramics and Composites, Physical and Theoretical Chemistry, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Condensed Matter Physics
Subjects: Technology > Chemical engineering
Department: Faculty of Engineering > Chemical and Process Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 25 Oct 2011 13:10
    Last modified: 05 Sep 2014 11:31
    URI: http://strathprints.strath.ac.uk/id/eprint/34079

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