Abstract
Thin films of yttria-stabilized zirconia (YSZ) deposited by sputtering and plasma spraying have been analysed as solid electrolyte for oxygen gas sensors and solid oxide fuel cells. Different substrates have been considered in order to provide good adhesion, dense electrolyte films, and mechanical and thermal stability. By optimization of the sputtering parameters, a Pt/YSZ/Pt assembly of 1.5 µm thickness and with an electrical resistance of 500 MΩ at room temperature has been obtained. The plasma-sprayed films (150 µm thickness) have shown oxygen ion conductivity with a reproducible sensitivity on oxygen partial pressure starting at 400 °C and an activation energy of ~1 eV. Lanthanum strontium manganate (350 µm thickness) was sprayed as cathode material.
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Acknowledgements
The authors would like to thank Dr Jianu and Dr Nicula for the synchrotron experiments, and Dr Käding for the impedance spectroscopy measurements.
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Presented at the OSSEP Workshop “Ionic and Mixed Conductors: Methods and Processes”, Aveiro, Portugal, 10–12 April 2003
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Fedtke, P., Wienecke, M., Bunescu, MC. et al. Yttria-stabilized zirconia films deposited by plasma spraying and sputtering. J Solid State Electrochem 8, 626–632 (2004). https://doi.org/10.1007/s10008-003-0485-6
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DOI: https://doi.org/10.1007/s10008-003-0485-6