Influence of Sb-substitution on ionic transport in lanthanum orthoniobates
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Accepted version
Author(s)
Type
Journal Article
Abstract
The results of ionic transport measurements for the lanthanum orthoniobate substituted with 10 and 30
mol% of antimony (LaNb0.9Sb0.1O4 and LaNb0.7Sb0.3O4) are presented and discussed. The influence of
calcium co-doping on these properties has also been analysed. It has been shown that for the
investigated material protonic conductivity predominates at temperatures up to 800 °C in
oxidizing atmospheres, in wet conditions. Maximum observed protonic conductivity reaches
~10-4 S/cm at 800 °C (in humidified air); in the dry conditions the increasing influence of
oxygen vacancies and holes is detected. Oxygen self-diffusivity has also been analysed by
isotopic exchange to investigate the possible diffusion paths.
mol% of antimony (LaNb0.9Sb0.1O4 and LaNb0.7Sb0.3O4) are presented and discussed. The influence of
calcium co-doping on these properties has also been analysed. It has been shown that for the
investigated material protonic conductivity predominates at temperatures up to 800 °C in
oxidizing atmospheres, in wet conditions. Maximum observed protonic conductivity reaches
~10-4 S/cm at 800 °C (in humidified air); in the dry conditions the increasing influence of
oxygen vacancies and holes is detected. Oxygen self-diffusivity has also been analysed by
isotopic exchange to investigate the possible diffusion paths.
Date Issued
2016-06-23
Date Acceptance
2016-06-21
Citation
Journal of Materials Chemistry A, 2016, 4 (30), pp.11696-11707
ISSN
2050-7496
Publisher
Royal Society of Chemistry
Start Page
11696
End Page
11707
Journal / Book Title
Journal of Materials Chemistry A
Volume
4
Issue
30
Copyright Statement
This journal is © The Royal Society of Chemistry 2016
Publication Status
Published