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초록
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 °C for 2 h and then reduced at 800 °C for 24 h in 3 % H2. 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.
키워드
Anode; Hydrazine reduction; Ni-GDC; SOFC; Anode material; Chemical routes; Composite powders; Degree of dispersion; Electrical property; Gadolinia doped ceria; Hydrazine reduction; NI particles; Ni-GDC; Reduction method; Small size; SOFC; Well-dispersed; Anodes; Cerium compounds; Electric properties; Hydrazine; Powders; Sintering; Solid oxide fuel cells (SOFC); Solvents; Nickel
- 제목
- Preparation of Ni-GDC powders by the solution reduction method using hydrazine and its electrical properties
- 저자
- Kim, S.-J.; Kim, K.-M.; Cho, P.-S.; Cho, Y.-H.; Lee, C.-Y.; Park, S.-Y.; Kang, Y.C.; Lee, J.-H.
- 발행일
- 2008
- 유형
- Article
- 저널명
- 한국재료학회지
- 권
- 18
- 호
- 12
- 페이지
- 660 ~ 663