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.
Authors
- dr inż. Sebastian Lech Wachowski link open in new tab ,
- dr hab. inż. Aleksandra Dorota Mielewczyk-Gryń link open in new tab ,
- mgr inż. Krzysztof Zagórski link open in new tab ,
- Cheng Li,
- prof. dr hab. inż. Piotr Jasiński link open in new tab ,
- dr Stephen J. Skinner,
- PhD Reidar Haugsrud,
- prof. dr hab. inż. Maria Gazda link open in new tab
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1039/c6ta03403a
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2016
