Preparation of Ni-GDC powders by the solution reduction method using hydrazine and its electrical properties

Sun Jung Kim, Kang Min Kim, Pyeong Seok Cho, Yoon Ho Cho, Choong Yong Lee, Seung Young Park, Yun Chan Kang, Jong Heun Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 °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.

Original languageEnglish
Pages (from-to)660-663
Number of pages4
JournalKorean Journal of Materials Research
Volume18
Issue number12
DOIs
Publication statusPublished - 2008 Dec 1

Keywords

  • Anode
  • Hydrazine reduction
  • Ni-GDC
  • SOFC

ASJC Scopus subject areas

  • Materials Science(all)

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