Abstract
A number of zirconia-based materials show promise as electrode materials in magnetohydrodynamic (MHD) generators. As a part of an exploratory programme to find suitable materials for graded electrode applications in MHD generators, partially stabilized and fully stabilized sintered ceramic materials are prepared and characterized. The oxygen ion transference number t ion(O2−) and electrical conductivity of this material are measured up to 1670 K in the oxygen partial pressure range 1 to 10−6 atm. The activation energies for conduction are determined. The electrical properties of this material are characterized by mixed conduction, ionic and electronic. The observed conductivity data are explained in terms of the defect equilibrium reactions between tetravelent Ce4+ and trivalent Ce3+ ions.
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Patil, D.S., Venkatramani, N. & Rohatgi, V.K. Electrical conductivity of (ZrO2)0.85(CeO2)0.12 (Y2O3)0.03 . J Mater Sci 23, 3367–3374 (1988). https://doi.org/10.1007/BF00551320
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DOI: https://doi.org/10.1007/BF00551320