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- W2063841736 abstract "Doped barium cerate perovskites are of interest as electrolytes for solid oxide fuel cells operating at 600–1000°C. Moreover, in this temperature range they display a transition from protonic to oxide ion conduction. In this study, the conductivity of BaCe0.9Gd0.1O2.95, previously reported only up to 800°C, was measured up to 1200°C using the a.c. van der Pauw technique. Data obtained in a range of atmospheres and plotted against log(PO2) displayed ionic, p-type and n-type components, which could be resolved by curve fitting to standard conductivity equations. The activation energies of the three components, estimated separately, were 0.52 eV for σi, 0.64 eV for σp and 2.6 eV for σn. These parameters were used to calculate the ionic transport number under high PO2, and low PO2, conditions and to map out the compound's ionic domain. The ionic transport numbers obtained for low and high oxygen partial pressures have been compared to those measured previously using concentration cells." @default.
- W2063841736 created "2016-06-24" @default.
- W2063841736 creator A5019784995 @default.
- W2063841736 date "1993-07-01" @default.
- W2063841736 modified "2023-09-25" @default.
- W2063841736 title "Transport study of the solid electrolyte BaCe0.9Gd0.1O2.95 at high temperatures" @default.
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- W2063841736 doi "https://doi.org/10.1016/0022-3697(93)90258-s" @default.
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