한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제43권12호
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  • Pages.781-787
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  • 2006
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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SOFC 음극 제조를 위한 NiO가 코팅된 YSZ 분말의 합성

Preparation of NiO Coated YSZ Powder for Fabrication of an SOFC Anode

  • 임광영 (홍익대학교 재료공학부) ;
  • 한인동 (홍익대학교 재료공학부) ;
  • 심수만 (홍익대학교 재료공학부) ;
  • 박준영 (한국과학기술연구원 나노재료연구센터) ;
  • 이해원 (한국과학기술연구원 나노재료연구센터) ;
  • 김주선 (한국과학기술연구원 나노재료연구센터)
  • Lim, Kwang-Young (School of Materials Science and Engineering, Hongik University) ;
  • Han, In-Dong (School of Materials Science and Engineering, Hongik University) ;
  • Sim, Soo-Man (School of Materials Science and Engineering, Hongik University) ;
  • Park, Jun-Young (Nano-Materials Research Center, Korea Institute of Science and Technology) ;
  • Lee, Hae-Won (Nano-Materials Research Center, Korea Institute of Science and Technology) ;
  • Kim, Joo-Sun (Nano-Materials Research Center, Korea Institute of Science and Technology)
  • 발행 : 2006.12.31
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초록

NiO-coated YSZ powder was prepared using heterogeneous precipitation of Ni hydroxides on YSZ particle surface and high energy milling. The powders were characterized by TG/DTA, XRD, XPS, and SEM. Amorphous Ni precipitate completely decomposed into NiO at $500^{\circ}C$ and the growth of NiO crystallites was constrained by the core particles. Nanocrystalline NiO-coated YSZ core-shell structure powder could be obtained after calcination at $800^{\circ}C$ for 2 h. A core-shell powder compact, due to high sinterability, showed a near theoretical density at $1350^{\circ}C$. After reduction at $900^{\circ}C$, interpenetrating Ni-YSZ microstructure with very uniformly distributed fine Ni and YSZ grains and pores was observed. In contrast, the mechanically mixed oxide sample showed less uniform distribution of pores and larger discontinuous We particles as compared with the core-shell samples.

키워드

참고문헌

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