Preparation and performance of novel ceramic interconnect materials (Pr0.5Nd0.5)0.7Ca0.3 CrO3-δ - Sm0.1Gd0.1Ce0.8O1.9

Yanzhi Ding, Xiaoyong Lu, Bin Lin, Xiaolian Wang, Yonghong Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A composite of (Pr0.5Nd0.5)0.7Ca0.3 CrO3-δ(PNCC) - Sm0.1Gd0.1Ce0.8O2-δ (SGDC) interconnect materials was synthesized by a sol-gel auto-ignition process. The phase and microstructure of the sintering sample were analyzed by X-ray diffraction and scanning electron microscope, respectively. The electrical conductivity of the samples was measured by four-probe technique. The results indicated that PNCC was chemically stable against reaction with SGDC at high temperatures. For 5% (in mass) SGDC, the relative density of the sample was 97.1% after sintering at 1 400°C for 5 h, and the electrical conductivity of the sample reached 47 S/cm in air and 4 S/cm in H2 at 700°C. The average thermal expansion coefficient of the sample was 10.4 × 10-6 K-1 at room temperature to 1000°C, which is close to that of electrolyte. Results indicate that the PNCC/SGDC composite is a very promising interconnect material for intermediate solid oxide fuel cells.

Original languageEnglish (US)
Pages (from-to)256-260
Number of pages5
JournalKuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
Volume40
Issue number2
StatePublished - 2012
Externally publishedYes

Keywords

  • Ceramic interconnect materials
  • Sintering ability
  • Solid oxide fuel cell
  • Thermal expansion coefficient

ASJC Scopus subject areas

  • Ceramics and Composites
  • Inorganic Chemistry
  • Materials Chemistry

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