Abstract
Very high electrical conductivity of ∼0.021 S/cm at 600 °C is obtained in Ce 0.79Gd 0.20Co 0.01O 2− δ . Corresponding activation energy of conduction ∼0.43 eV measured in the temperature range of 400–700 °C is found to be notably low. Improved electrical properties with 99% of the theoretical density as obtained for these specimens, prepared using powder of average particle size ∼20 nm and subsequent sintering at 1100 °C, is considered to be a significant step to reduce the processing temperature. The measured electrical potential of ∼1 V indicates the suitability of its use as an electrolyte in electrochemical devices.
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