Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Preparation of Ni-GDC Powders by the Solution Reduction Method Using Hydrazine and Its Electrical Properties

하이드라진을 이용한 용액환원법에 의한 Ni-GDC 미분말 합성과 전기적 특성

  • Kim, Sun-Jung (Department of Materials Science and Engineering, Korea University) ;
  • Kim, Kang-Min (Department of Materials Science and Engineering, Korea University) ;
  • Cho, Pyeong-Seok (Department of Materials Science and Engineering, Korea University) ;
  • Cho, Yoon-Ho (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Choong-Yong (Department of Materials Science and Engineering, Korea University) ;
  • Park, Seung-Young (Department of Materials Science and Engineering, Korea University) ;
  • Kang, Yun-Chan (Department of Chemical Engineering, Konkuk University) ;
  • Lee, Jong-Heun (Department of Materials Science and Engineering, Korea University)
  • 김선중 (고려대학교 신소재공학부) ;
  • 김강민 (고려대학교 신소재공학부) ;
  • 조평석 (고려대학교 신소재공학부) ;
  • 조윤호 (고려대학교 신소재공학부) ;
  • 이충용 (고려대학교 신소재공학부) ;
  • 박승영 (고려대학교 신소재공학부) ;
  • 강윤찬 (건국대학교 화학공학과) ;
  • 이종흔 (고려대학교 신소재공학부)
  • Published : 2008.12.27
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Abstract

Ni-GDC (gadolinia-doped ceria) composite powders, the anode material for the application of solid oxide fuel cells, were prepared by a solution reduction method using hydrazine. The distribution of Ni particles in the composite powders was homogeneous. The Ni-GDC powders were sintered at $1400^{\circ}C$ for 2 h and then reduced at $800^{\circ}C$ for 24 h in 3% $H_2$. The percolation limit of Ni of the sintered composite was 20 vol%, which was significantly lower than these values in the literature (30-35 vol%). The marked decrease of percolation limit is attributed to the small size of the Ni particles and the high degree of dispersion. The hydrazine method suggests a facile chemical route to prepare well-dispersed Ni-GDC composite powders.

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