Synthesis and characterization of oxygen-deficient oxides BaCo1 - xYxO3 - y, x = 0.15, 0.25 and 0.33, with the perovskite structure

M. V. Lomakov, S. Ya Istomin, A. M. Abakumov, G. Van Tendeloo, E. V. Antipov

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12 Citations (Scopus)

Abstract

Oxygen-deficient complex cobalt oxides BaCo1 - xYxO3 - y, = 0.15, 0.25 and 0.33, with a cubic perovskite structure have been synthesized in air at 1100 °C using a citrate route. Cation composition of the compounds was confirmed by energy-dispersed X-ray (EDX) microanalysis while oxygen content was determined by iodometric titration. An electron diffraction (ED) study of the x = 0.25 and 0.33 compositions show the presence of a diffuse intensity, indicating possible short-range ordering of the B cations. It was found that the treatment of BaCo0.75Y0.25O2.55 in a humid atmosphere leads to the absorption of water vapour at the first stage. Oxygen permeation studies of the ceramic membranes of BaCo0.75Y0.25O2.55 and BaCo0.67Y0.33O2.55 with variable thickness showed high oxygen fluxes of 0.17-0.32 μmol/cm2/s at 950 °C.

Original languageEnglish
Pages (from-to)1885-1889
Number of pages5
JournalSolid State Ionics
Volume179
Issue number33-34
DOIs
Publication statusPublished - 15 Oct 2008
Externally publishedYes

Keywords

  • Electron diffraction
  • Oxygen permeability
  • Perovskite

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