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Ionic conductivity ...
Ionic conductivity and thermal stability of magnetron-sputtered nanocrystalline yttria-stabilized zirconia
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- Sillassen, M. (författare)
- University of Aarhus, Department of Physics and Astronomy and Interdisciplinary Nanoscience Center (iNANO)
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- Eklund, Per (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Sridharan, M. (författare)
- University of Aarhus, Department of Physics and Astronomy and Interdisciplinary Nanoscience Center (iNANO)
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- Pryds, N. (författare)
- Technical University of Denmark, Riso National Laboratory for Sustainable Energy,Fuell Cells and Solid State Chemistry Division
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- Bonanos, N. (författare)
- Technical University of Denmark, Riso National Laboratory for Sustainable Energy,Fuell Cells and Solid State Chemistry Division
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- Bottiger, J. (författare)
- University of Aarhus, Department of Physics and Astronomy and Interdisciplinary Nanoscience Center (iNANO)
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(creator_code:org_t)
- AIP Publishing, 2009
- 2009
- Engelska.
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Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 105:10, s. 104907-
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://backend.orbi...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Thermally stable, stoichiometric, cubic yttria-stabilized zirconia (YSZ) thin-film electrolytes have been synthesized by reactive pulsed dc magnetron sputtering from a Zr-Y (80/20 at. %) alloy target. Films deposited at floating potential had a ‹111› texture. Single-line profile analysis of the 111 x-ray diffraction peak yielded a grain size of ~20 nm and a microstrain of ~2% regardless of deposition temperature. Films deposited at 400 °C and selected bias voltages in the range from -70 to -200 V showed a reduced grain size for higher bias voltages, yielding a grain size of ~6 nm and a microstrain of ~2.5% at bias voltages of -175 and -200 V with additional incorporation of argon. The films were thermally stable; very limited grain coarsening was observed up to an annealing temperature of 800 °C. Temperature-dependent impedance spectroscopy analysis of the YSZ films with Ag electrodes showed that the in-plane ionic conductivity was within one order of magnitude higher in films deposited with substrate bias corresponding to a decrease in grain size compared to films deposited at floating potential. This suggests that there is a significant contribution to the ionic conductivity from grain boundaries. The activation energy for oxygen ion migration was determined to be between 1.14 and 1.30 eV.
Nyckelord
- NATURAL SCIENCES
- NATURVETENSKAP
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