Original Article |
2013, Vol.35, No.5, pp. 557-561
Effect of Sr and Y on microstructure and electrical conductivity of BaCeO3
Siriwan Chokkha and Sutin Kuharuangrong
pp. 557 - 561
Abstract
The compositions of Sr doped BaCeO3 synthesized by citrate gel method have been investigated as a potential proton conducting electrolyte for intermediate temperature solid oxide fuel cell (IT-SOFC). The average grain size of Ba0.9Sr0.1CeO3 after sintering at 1,300°C decreased as compared to base material, however it increased with the amount of Sr. The highest grain conductivity is obtained from Ba0.9Sr0.1CeO3 and its value at 700°C is 8.86×10-4 S.cm-1. In addition, Y dopant was selected to further improve the electrical conductivity of Ba0.9Sr0.1CeO3 . The grain boundary conductivity at 700°C of Ba0.9Sr0.1Ce0.9Y0.1O3-δ is 9.34×10-3 S.cm-1.