Double-site yttria-doped Sr1−xYxCo1−yYyO3−δ perovskite oxides as oxygen semi-permeable membranes

Zhang, Kun, Ran, Ran, Ge, Lei, Shao, Zongping, Jin, Wanqin and Xu, Nanping (2009) Double-site yttria-doped Sr1−xYxCo1−yYyO3−δ perovskite oxides as oxygen semi-permeable membranes. Journal of Alloys and Compounds, 474 1-2: 477-483. doi:10.1016/j.jallcom.2008.06.120


Author Zhang, Kun
Ran, Ran
Ge, Lei
Shao, Zongping
Jin, Wanqin
Xu, Nanping
Title Double-site yttria-doped Sr1−xYxCo1−yYyO3−δ perovskite oxides as oxygen semi-permeable membranes
Formatted title
Double-site yttria-doped Sr1−xYxCo1−yYyO3−δ perovskite oxides as oxygen semi-permeable membranes
Journal name Journal of Alloys and Compounds   Check publisher's open access policy
ISSN 0925-8388
1873-4669
Publication date 2009-04
Sub-type Article (original research)
DOI 10.1016/j.jallcom.2008.06.120
Volume 474
Issue 1-2
Start page 477
End page 483
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
New mixed conducting oxides with the composition of Sr1−xYxCo1−yYyO3−δ (x = 0.0–0.8, y = 0.0–0.1) were exploited and synthesized. The resulted materials were investigated by X-ray diffraction, four-probe dc conductivity, temperature-programmed desorption characterization, and oxygen permeability measurement. As compared with the oxides with only one-site (A or B) being Y3+-doped, i.e., Sr1−xYxCoO3−δ and SrCo1−yYyO3−δ, the double-site Y3+-doped ones show improved phase stability, higher electrical conductivity under reduced atmosphere, and higher oxygen permeability and stability. Particularly, Sr0.95Y0.05Co0.95Y0.05O3−δ oxide demonstrates stable cubic perovskite phase in air, oxygen and nitrogen, high electrical conductivity of ∼110 S cm−1 in air and ∼50 S cm−1 in nitrogen, and a maximum permeation flux of 1.35 × 10−6 mol cm−2 s−1 at 900 °C under an air/helium gradient. Long-term permeation study at 850 °C indicates that Sr0.95Y0.05Co0.95Y0.05O3−δ can operate stably as oxygen semi-permeable membrane.
Keyword Perovskite
Mixed conductivity
Membrane
Oxygen permeation
Ceramic Membranes
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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