Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

Sebastian Wachowski; Aleksandra Mielewczyk-Gryń; Krzysztof Zagórski; Cheng Li; Piotr Jasiński; Stephen J. Skinner; Reidar Haugsrud; Maria Gazda

doi:10.1039/c6ta03403a

Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

Sebastian Wachowski, Aleksandra Mielewczyk-Gryń, Krzysztof Zagórski, Cheng Li, Piotr Jasiński, Stephen J. Skinner, Reidar Haugsrud, Maria Gazda

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Abstract

The results of ionic transport measurements for the lanthanum orthoniobate substituted with 10 and 30 mol% of antimony (LaNb_0.9Sb_0.1O₄ and LaNb_0.7Sb_0.3O₄) 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.

Original language	English
Pages (from-to)	11696-11707
Number of pages	12
Journal	Journal of Materials Chemistry A
Volume	4
Issue number	30
DOIs	https://doi.org/10.1039/c6ta03403a
State	Published - 2016
Externally published	Yes

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title = "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.",

author = "Sebastian Wachowski and Aleksandra Mielewczyk-Gry{\'n} and Krzysztof Zag{\'o}rski and Cheng Li and Piotr Jasi{\'n}ski and Skinner, {Stephen J.} and Reidar Haugsrud and Maria Gazda",

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doi = "10.1039/c6ta03403a",

language = "English",

volume = "4",

pages = "11696--11707",

journal = "Journal of Materials Chemistry A",

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TY - JOUR

T1 - Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

AU - Wachowski, Sebastian

AU - Mielewczyk-Gryń, Aleksandra

AU - Zagórski, Krzysztof

AU - Li, Cheng

AU - Jasiński, Piotr

AU - Skinner, Stephen J.

AU - Haugsrud, Reidar

AU - Gazda, Maria

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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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U2 - 10.1039/c6ta03403a

DO - 10.1039/c6ta03403a

M3 - Article

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SN - 2050-7488

VL - 4

SP - 11696

EP - 11707

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 30

ER -

Influence of Sb-substitution on ionic transport in lanthanum orthoniobates

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