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Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

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 under wet conditions. The maximum observed protonic conductivity reaches ∼10−4 S cm−1 at 800 °C (in humidified air); under 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.

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DOI:
Digital Object Identifier (open in new tab) 10.1039/C6TA03403A
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Copyright (2016 The Royal Society of Chemistry)

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
Journal of Materials Chemistry A no. 4, pages 1 - 12,
ISSN: 2050-7488
Language:
English
Publication year:
2016
Bibliographic description:
Wachowski S., Mielewczyk-Gryń A., Zagórski K., Li C., Jasiński P., Skinner S., Haugsrud R., Gazda M.: Influence of Sb-substitution on ionic transport in lanthanum orthoniobates// Journal of Materials Chemistry A. -Vol. 4, (2016), s.1-12
DOI:
Digital Object Identifier (open in new tab) 10.1039/c6ta03403a
Verified by:
Gdańsk University of Technology

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