| Ceria의 소결과 전기전도도에 미치는 첨가제의 영향 |
| 유경빈, 오은주, 최경만 |
| 포항공과대학교 신소재공학과 |
| Effect of Additives on the Densification and Electrical Properties of Ce0.8Gd0.2O2-δ Ceramics |
| Kyung-Bin Yoo, Eun-Ju Oh, Gyeong-Man Choi |
| Fuel Cell Research Center and Department of Materials Science and Engineering, Pohang University of Science and Technology |
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| ABSTRACT |
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The doped-ceria is a strong candidate material for an intermediate temperature SOFC. However, the mechanical strength and the magnitude of electrical conductivity need to be increased at low sintering temperature. In this study, to improve both properties, $1at% $ of Mg, Ca, Cr, Fe, Co, Ni, Cu, Ga, and Zr were added to the GDC20 ($20at%$ Gd-doped Ceria) and sintered at $1350^{circ}C$ that is $250^{circ}C$ lower than $1600^{circ}C$. With addition, the relative density of the sintered sample increased. Fe, Co, Ni, Cu, Ga doped-GDC20 showed high relative density over $92%$. Among them, Ga doped-GDC20 showed the most improved sinterability. The conductivity of doped |
| Key words:
SOFC, Electrolyte, GDC, Impedance, Sintering |
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