| 고체산화물연료전지 연결재용 La0.7Ca0.3Cr0.9Co0.1O3-δ 조성계에 Ca Source 변화에 따른 소결 및 전기적 특성에 관한 연구 |
| 박성태, 최병현, 지미정, 안용태, 최헌진1 |
한국세라믹기술원 전자.광 소재센터
1연세대학교 세라믹공학과 |
| Effects of Ca-Source on the Sintering and Electrical Properties of La0.7Ca0.3Cr0.9Co0.1O3-δ for Solid Oxide Fuel Cell Interconnects |
| Sung-Tae Park, Byung-Hyun Choi, Mi-Jung Ji, Yong-Tae An, Heon-Jin Choi1 |
Electronic & Optic Materials Center, KICET
1Department of Ceramic Engineering, Yonsei University |
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| ABSTRACT |
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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. |
| Key words:
Solid oxide fuel cell (SOFC), Interconnect, Ca-source, $CaF^2$ |
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