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J. Korean Ceram. Soc. > Volume 43(12); 2006 > Article
Journal of the Korean Ceramic Society 2006;43(12): 781.
doi: https://doi.org/10.4191/kcers.2006.43.12.781
SOFC 음극 제조를 위한 NiO가 코팅된 YSZ 분말의 합성
임광영, 한인동, 심수만, 박준영1, 이해원1, 김주선1
홍익대학교 재료공학부
1한국과학기술연구원 나노재료연구센터
Preparation of NiO Coated YSZ Powder for Fabrication of an SOFC Anode
Kwang-Young Lim, In-Dong Han, Soo-Man Sim, Jun-Young Park1, Hae-Won Lee1, Joo-Sun Kim1
School of Materials Science and Engineering, Hongik University
1Nano-Materials Research Center, Korea Institute of Science and Technology
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.
Key words: SOFC Anode, Precipitation, Milling, Coating, NiO-YSZ
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