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

Zhang, Kun and Ran, Ran and Ge, Lei and Shao, Zongping and 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). pp. 477-483. ISSN 0925-8388

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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 07 Aug 2019 23:32
Last Modified: 09 Aug 2019 04:57
Uncontrolled Keywords: perovskite, mixed conductivity, membrane, oxygen permeation
Fields of Research : 03 Chemical Sciences > 0302 Inorganic Chemistry > 030206 Solid State Chemistry
09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8610 Ceramics, Glass and Industrial Mineral Products > 861002 Ceramics
Identification Number or DOI: 10.1016/j.jallcom.2008.06.120
URI: http://eprints.usq.edu.au/id/eprint/36472

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