BaCe0.9-xNbxY0.1O3-delta (where x=0, 0.01, 0.03 and 0.05) powders were synthesized by solid-state reaction to investigate the influence of Nb concentration on chemical stability and electrical properties of the sintered samples. The dense electrolyte pellets were formed from the powders after being uniaxially pressed and sintered at 1550 degrees C. The electrical conductivities determined by impedance measurements in temperature range of 550-750 degrees C in different atmospheres (dry argon and wet hydrogen) showed a decreasing trend with an increase of Nb content. For all samples higher conductivities were observed in the wet hydrogen than in dry argon atmosphere. The chemical stability was enhanced with increasing of Nb concentration. It was found that BaCe0.87Nb0.03Y0.1O3-delta is the optimal composition that satisfies the opposite demands for electrical conductivity and chemical stability, reaching 0.8 x 10(-2) S cm(-1) in wet hydrogen at 650 degrees C compared to 1.01 x 10(-2) S c...m(-1) for undoped electrolyte.
TY - JOUR
AU - Radojković, Aleksandar
AU - Žunić, Milan
AU - Savić, Slavica M.
AU - Branković, Goran
AU - Branković, Zorica
PY - 2013
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/634
AB - BaCe0.9-xNbxY0.1O3-delta (where x=0, 0.01, 0.03 and 0.05) powders were synthesized by solid-state reaction to investigate the influence of Nb concentration on chemical stability and electrical properties of the sintered samples. The dense electrolyte pellets were formed from the powders after being uniaxially pressed and sintered at 1550 degrees C. The electrical conductivities determined by impedance measurements in temperature range of 550-750 degrees C in different atmospheres (dry argon and wet hydrogen) showed a decreasing trend with an increase of Nb content. For all samples higher conductivities were observed in the wet hydrogen than in dry argon atmosphere. The chemical stability was enhanced with increasing of Nb concentration. It was found that BaCe0.87Nb0.03Y0.1O3-delta is the optimal composition that satisfies the opposite demands for electrical conductivity and chemical stability, reaching 0.8 x 10(-2) S cm(-1) in wet hydrogen at 650 degrees C compared to 1.01 x 10(-2) S cm(-1) for undoped electrolyte.
PB - Elsevier Sci Ltd, Oxford
T2 - Ceramics International
T1 - Chemical stability and electrical properties of Nb doped BaCe0.9Y0.1O3-delta as a high temperature proton conducting electrolyte for IT-SOFC
EP - 313
IS - 1
SP - 307
VL - 39
DO - 10.1016/j.ceramint.2012.06.026
ER -
@article{
author = "Radojković, Aleksandar and Žunić, Milan and Savić, Slavica M. and Branković, Goran and Branković, Zorica",
year = "2013",
abstract = "BaCe0.9-xNbxY0.1O3-delta (where x=0, 0.01, 0.03 and 0.05) powders were synthesized by solid-state reaction to investigate the influence of Nb concentration on chemical stability and electrical properties of the sintered samples. The dense electrolyte pellets were formed from the powders after being uniaxially pressed and sintered at 1550 degrees C. The electrical conductivities determined by impedance measurements in temperature range of 550-750 degrees C in different atmospheres (dry argon and wet hydrogen) showed a decreasing trend with an increase of Nb content. For all samples higher conductivities were observed in the wet hydrogen than in dry argon atmosphere. The chemical stability was enhanced with increasing of Nb concentration. It was found that BaCe0.87Nb0.03Y0.1O3-delta is the optimal composition that satisfies the opposite demands for electrical conductivity and chemical stability, reaching 0.8 x 10(-2) S cm(-1) in wet hydrogen at 650 degrees C compared to 1.01 x 10(-2) S cm(-1) for undoped electrolyte.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Chemical stability and electrical properties of Nb doped BaCe0.9Y0.1O3-delta as a high temperature proton conducting electrolyte for IT-SOFC",
pages = "313-307",
number = "1",
volume = "39",
doi = "10.1016/j.ceramint.2012.06.026"
}
Radojković, A., Žunić, M., Savić, S. M., Branković, G.,& Branković, Z.. (2013). Chemical stability and electrical properties of Nb doped BaCe0.9Y0.1O3-delta as a high temperature proton conducting electrolyte for IT-SOFC. in Ceramics International
Elsevier Sci Ltd, Oxford., 39(1), 307-313.
https://doi.org/10.1016/j.ceramint.2012.06.026
Radojković A, Žunić M, Savić SM, Branković G, Branković Z. Chemical stability and electrical properties of Nb doped BaCe0.9Y0.1O3-delta as a high temperature proton conducting electrolyte for IT-SOFC. in Ceramics International. 2013;39(1):307-313.
doi:10.1016/j.ceramint.2012.06.026 .
Radojković, Aleksandar, Žunić, Milan, Savić, Slavica M., Branković, Goran, Branković, Zorica, "Chemical stability and electrical properties of Nb doped BaCe0.9Y0.1O3-delta as a high temperature proton conducting electrolyte for IT-SOFC" in Ceramics International, 39, no. 1 (2013):307-313,
https://doi.org/10.1016/j.ceramint.2012.06.026 . .
