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http://dx.doi.org/10.7316/khnes.2011.22.1.092

Chemical Instability of $BaCeO_3$-Based Proton Conducting Oxide  

Byeon, Myeong-Seop (Gyeongsang National University)
Kang, Eun-Tae (Gyeongsang National University)
Cho, Woo-Seok (Korea Institute of Ceramic Engineering and Technology)
Kim, Jin-Ho (Korea Institute of Ceramic Engineering and Technology)
Hwang, Kwang-Taek (Korea Institute of Ceramic Engineering and Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.22, no.1, 2011 , pp. 92-99 More about this Journal
Abstract
Barium cerate ($BaCeO_3$) related perovskite ceramics currently dominate the high-temperature proton conductor field. Unfortunately, these materials have very stringent environmental limitations necessitating the costly and complex conditioning or cleaning of the application feed-gas. Commercial realization has been hampered, in part, because of the reactivity of $BaCeO_3$ with $CO_2$, and to some extent $H_2O$. And sintered $BaCeO_3$ decomposed at a rate comparable to the powder samples. In this article, the chemical stability and the structural changes of $BaCe_{0.9-X}Y0.1La_XO_{3-\delta}$ (X=0, 0.1, 0.2) have been systematically investigated in the atmosphere containing carbon dioxide ($CO_2$) and water vapor ($H_2O$). The sintering characteristics were studied in $1600^{\circ}C$, sintered pellets disintegrate and decompose upon contacting boiling water on the surface only.
Keywords
$La-BaCeO_3$; $Y-BaCeO_3$; Chemical instability; $H_2O$ reactivity; $CO_2$ reactivity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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