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 Ba_0.9Sr_0.1CeO₃
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 Ba_0.9Sr_0.1CeO₃
 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 Ba_0.9Sr_0.1CeO₃
. The grain boundary conductivity at 700°C of
Ba_0.9Sr_0.1Ce_0.9Y_0.1O_3-δ
 is 9.34×10^-3 S.cm^-1.

Keywords

• impedance spectra
• conductivity
• citrate gel
• BaCeO₃