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http://dx.doi.org/10.4191/KCERS.2011.48.3.246

Effects of Ca-Source on the Sintering and Electrical Properties of La0.7Ca0.3Cr0.9Co0.1O3-δ for Solid Oxide Fuel Cell Interconnects  

Park, Sung-Tae (Electronic & Optic Materials Center, KICET)
Choi, Byung-Hyun (Electronic & Optic Materials Center, KICET)
Ji, Mi-Jung (Electronic & Optic Materials Center, KICET)
An, Yong-Tae (Electronic & Optic Materials Center, KICET)
Choi, Heon-Jin (Department of Ceramic Engineering, Yonsei University)
Publication Information
Journal of the Korean Ceramic Society / v.48, no.3, 2011 , pp. 246-250 More about this Journal
Abstract
Effects on sintering and electrical properties of $La_{0.7}Ca_{0.3}Cr_{0.9}Co_{0.1}O_{3-{\delta}}$ system, a interconnect material for cylindrical and flat tubular solid oxide fuel cells (SOFC), have been investigated by Ca-source when using $CaCO_3$ and $CaF_2$. When using $CaCO_3$ and $CaF_2$ was mixing as Ca-source, single phased perovskite solid solution was observed for each sample. The sintering temperature was decreased by $CaF_2$ contents was increased. When using 0.1 mole $CaF_2$ was densely sintered at $1400^{\circ}C$ and relative density was 93.8%. Also, electrical conductivity in oxidation and reducing atmosphere was 47, 4.3 S/cm, respectively, due to $F^-$ ion enhance the electrical conductivity in reducing atmosphere.
Keywords
Solid oxide fuel cell (SOFC); Interconnect; Ca-source; $CaF^2$;
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