Title
Synthesis and characterization of oxygen-deficient oxides <tex>$BaCo_{1-x}Y_{x}O_{3-y'}$</tex> x = 0.15, 0.25 and 0.33, with the perovskite structure Synthesis and characterization of oxygen-deficient oxides <tex>$BaCo_{1-x}Y_{x}O_{3-y'}$</tex> x = 0.15, 0.25 and 0.33, with the perovskite structure
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Source (journal)
Solid state ionics. - Amsterdam
Volume/pages
179(2008) :33/34 , p. 1885-1889
ISSN
0167-2738
ISI
000261870800009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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 0.170.32 µmol/cm2/s at 950 °C.
E-info
https://repository.uantwerpen.be/docman/iruaauth/4f5c4d/9755fba9783.pdf
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