The influence of Ta concentration on the stability of BaCe(0.9-)xTa(x)Y(0.1)O(3-delta) (where x=0.01, 0.03 and 0.05) powders and sintered samples in CO2, their microstructure and electrical properties were investigated. The ceramic powders were synthesized by the method of solid state reaction, uniaxially pressed and sintered at 1550 degrees C to form dense electrolyte pellets. A significant stability in CO2 indicated by the X-ray analysis performed was observed for the samples with x >= 0.03. The electrical conductivities determined by impedance measurements in the temperature range of 550-750 degrees C and in various atmospheres (dry argon, wet argon and wet hydrogen) increased with temperature but decreased with Ta concentration. The highest conductivities were observed in the wet hydrogen atmosphere, followed by those in wet argon, while the lowest were obtained in the dry argon atmosphere for each dopant concentration. The composition with Ta content of 3 mol% showed satisfactory ...characteristics: good resistance to CO2 in extreme testing conditions, while a somewhat reduced electrical conductivity is still comparable with that of BaCe0.9Y0.1O3-delta.
Keywords:
D. Perovskites / C. Electrical properties / A. Powders: solid state reaction
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/123456789/720
AB - The influence of Ta concentration on the stability of BaCe(0.9-)xTa(x)Y(0.1)O(3-delta) (where x=0.01, 0.03 and 0.05) powders and sintered samples in CO2, their microstructure and electrical properties were investigated. The ceramic powders were synthesized by the method of solid state reaction, uniaxially pressed and sintered at 1550 degrees C to form dense electrolyte pellets. A significant stability in CO2 indicated by the X-ray analysis performed was observed for the samples with x >= 0.03. The electrical conductivities determined by impedance measurements in the temperature range of 550-750 degrees C and in various atmospheres (dry argon, wet argon and wet hydrogen) increased with temperature but decreased with Ta concentration. The highest conductivities were observed in the wet hydrogen atmosphere, followed by those in wet argon, while the lowest were obtained in the dry argon atmosphere for each dopant concentration. The composition with Ta content of 3 mol% showed satisfactory characteristics: good resistance to CO2 in extreme testing conditions, while a somewhat reduced electrical conductivity is still comparable with that of BaCe0.9Y0.1O3-delta.
PB - Elsevier Sci Ltd, Oxford
T2 - Ceramics International
T1 - Enhanced stability in CO2 of Ta doped BaCe0.9Y0.1O3-delta electrolyte for intermediate temperature SOFCs
EP - 2637
IS - 3
SP - 2631
VL - 39
DO - 10.1016/j.ceramint.2012.09.028
ER -
@article{
author = "Radojković, Aleksandar and Žunić, Milan and Savić, Slavica M. and Branković, Goran and Branković, Zorica",
year = "2013",
abstract = "The influence of Ta concentration on the stability of BaCe(0.9-)xTa(x)Y(0.1)O(3-delta) (where x=0.01, 0.03 and 0.05) powders and sintered samples in CO2, their microstructure and electrical properties were investigated. The ceramic powders were synthesized by the method of solid state reaction, uniaxially pressed and sintered at 1550 degrees C to form dense electrolyte pellets. A significant stability in CO2 indicated by the X-ray analysis performed was observed for the samples with x >= 0.03. The electrical conductivities determined by impedance measurements in the temperature range of 550-750 degrees C and in various atmospheres (dry argon, wet argon and wet hydrogen) increased with temperature but decreased with Ta concentration. The highest conductivities were observed in the wet hydrogen atmosphere, followed by those in wet argon, while the lowest were obtained in the dry argon atmosphere for each dopant concentration. The composition with Ta content of 3 mol% showed satisfactory characteristics: good resistance to CO2 in extreme testing conditions, while a somewhat reduced electrical conductivity is still comparable with that of BaCe0.9Y0.1O3-delta.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Enhanced stability in CO2 of Ta doped BaCe0.9Y0.1O3-delta electrolyte for intermediate temperature SOFCs",
pages = "2637-2631",
number = "3",
volume = "39",
doi = "10.1016/j.ceramint.2012.09.028"
}
Radojković, A., Žunić, M., Savić, S. M., Branković, G.,& Branković, Z.. (2013). Enhanced stability in CO2 of Ta doped BaCe0.9Y0.1O3-delta electrolyte for intermediate temperature SOFCs. in Ceramics International
Elsevier Sci Ltd, Oxford., 39(3), 2631-2637.
https://doi.org/10.1016/j.ceramint.2012.09.028
Radojković A, Žunić M, Savić SM, Branković G, Branković Z. Enhanced stability in CO2 of Ta doped BaCe0.9Y0.1O3-delta electrolyte for intermediate temperature SOFCs. in Ceramics International. 2013;39(3):2631-2637.
doi:10.1016/j.ceramint.2012.09.028 .
Radojković, Aleksandar, Žunić, Milan, Savić, Slavica M., Branković, Goran, Branković, Zorica, "Enhanced stability in CO2 of Ta doped BaCe0.9Y0.1O3-delta electrolyte for intermediate temperature SOFCs" in Ceramics International, 39, no. 3 (2013):2631-2637,
https://doi.org/10.1016/j.ceramint.2012.09.028 . .
