한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제42권12호
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  • Pages.816-820
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  • 2005
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Ceria의 소결과 전기전도도에 미치는 첨가제의 영향

Effect of Additives on the Densification and Electrical Properties of Ce0.8Gd0.2O2-δ Ceramics

  • 유경빈 (포항공과대학교 신소재공학과) ;
  • 오은주 (포항공과대학교 신소재공학과) ;
  • 최경만 (포항공과대학교 신소재공학과)
  • Yoo, Kyung-Bin (Fuel Cell Research Center and Department of Materials Science and Engineering, Pohang University of Science and Technology) ;
  • Oh, Eun-Ju (Fuel Cell Research Center and Department of Materials Science and Engineering, Pohang University of Science and Technology) ;
  • Choi, Gyeong-Man (Fuel Cell Research Center and Department of Materials Science and Engineering, Pohang University of Science and Technology)
  • 발행 : 2005.12.01
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초록

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 doped­GDC20 increased by $\~10$ times at $300\~700^{\circ}C$.

키워드

참고문헌

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