Mechanical strengthening of Sm-doped CeO2 ceramics by 1 mol% cobalt oxide for solid oxide fuel cell application

Yingchao Dong*, Stuart Hampshire, Jian Er Zhou, Xinfa Dong, Lin Bin, Guangyao Meng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Combustion processed nano-sized Ce0.79Sm0.20Co 0.01O2-δ (CSCoO) and Ce0.80Sm 0.20O2-δ (CSO) were sintered at various temperatures, and mechanical properties and microstructures were characterized. The results demonstrate that besides a lowering of sintering temperature to achieve sufficient densification, the doping of very minor amounts of CoO (1 mol%) to CSO significantly enhanced mechanical properties. The CSCoO sintered at 1100 °C exhibits a biaxial flexural strength of 354 ± 42 MPa which compared with 194 ± 57 MPa for CSO with a similar relative density sintered at 1400 °C. This slight modification in chemical composition also resulted in a slight improvement in micro-hardness.

Original languageEnglish (US)
Pages (from-to)8402-8405
Number of pages4
JournalJournal of Power Sources
Volume196
Issue number20
DOIs
StatePublished - Oct 15 2011

Keywords

  • CoO co-doping
  • Mechanical strengthening
  • SOFC electrolyte
  • Sm-doped CeO

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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