Characterization of Ni-YSZ cermet anode for SOFC prepared by glycine nitrate process (Glycine nitrate process에 의한 제조된 SOFC anode용 Ni-YSZ cermet의 물성 분석)

TAE-SUK LEE (이태석); 고정훈; 이강석; 김복희

Characterization of Ni-YSZ cermet anode for SOFC prepared by glycine nitrate process

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2011, 21(1), pp.21-26
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

TAE-SUK LEE ¹, 고정훈 ², 이강석 ², 김복희 ²

¹한국해양대학교
²전북대학교

Accredited

ABSTRACT

Ni-YSZ (Yttria Stabilized Zirconia) composite powders were fabricated by glycine nitrate process. The prepared powders were sintered at 1300~1400oC for 4 h in air and reduced at 1000oC for 2 h in a nitrogen and hydrogen atmosphere. The microstructure, electrical conductivity, thermal expansion and mechanical properties of the Ni-YSZ cermets have been investigated with respect to the volume contents of Ni. A porous microstructure consisting of homogeneously distributed Ni and YSZ phases together with well-connected grains was observed. It was found that the open porosity,electrical conductivity, thermal expansion and bending strength of the cermets are sensitive to the volume content of Ni. The Ni-YSZ cermet containing 40 vol% Ni was ascertained to be the optimum composition. This composition offers sufficient open porosity of more than 30 %, superior electrical conductivities of 917.4 S/cm at 1000oC and a moderate average thermal expansion coefficient of 12.6 × 10−6oC−1between room temperature and 1000oC.

KEYWORDS

Ni-YSZ, SOFC, Powder synthesis, Glycine nitrate process, New renewable energy, Fuel cell

Citation status

* References for papers published after 2023 are currently being built.

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19