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Issue 30, 2016
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Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

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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.

Graphical abstract: Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

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Article information


Submitted
23 Apr 2016
Accepted
22 Jun 2016
First published
23 Jun 2016

J. Mater. Chem. A, 2016,4, 11696-11707
Article type
Paper

Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

S. Wachowski, A. Mielewczyk-Gryń, K. Zagórski, C. Li, P. Jasiński, S. J. Skinner, R. Haugsrud and M. Gazda, J. Mater. Chem. A, 2016, 4, 11696
DOI: 10.1039/C6TA03403A

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