Hydrothermal synthesis and properties of Ce1-xGdxO2-δ solid solutions

S. Dikmen, P. Shuk, M. Greenblatt, H. Gocmez

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130 Scopus citations

Abstract

The structure, ionic and electronic conductivities of Ce1-xGdxO2-δ (x = 0-0.30) solid solutions, prepared in a wide substitutional range for the first time hydrothermally, were investigated. The uniformly small particle size (41-68 nm) of the hydrothermally prepared materials allows sintering of the samples into highly dense ceramic pellets at 1300-1400°C, a significantly lower temperature than 1600-1650°C, which is required for ceria solid electrolytes prepared by solid state techniques. The solubility limit of Gd2O3 in CeO2 was determined to be over 30 mol %. The maximum conductivity, σ600°C ∼ 7.53 × 10-3 S cm-1 with Ea = 0.58 eV, was found at x = 0.25.

Original languageEnglish (US)
Pages (from-to)585-590
Number of pages6
JournalSolid State Sciences
Volume4
Issue number5
DOIs
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Keywords

  • Cerium oxide
  • Gadolinium oxide
  • Hydrothermal preparation
  • Oxide ion conductors

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