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    A Comparative Study of the Performance of SrCo0.76Fe0.19Al0.1Ox and (SrCo0.8Fe0.2O3-deltda)0.95(SrAl2O4)0.05 Mixed-Conducting Membranes

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    Authors
    Zhu, N.
    Zhang, G.
    Liu, Z.
    Dong, X.
    Jin, W.
    Liu, Shaomin
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhu, Na and Zhang, Guangru and Liu, Zhengkun and Dong, Xueliang and Jin, Wanqin and Liu, Shaomin. 2013. A comparative study of the performance of SrCo0.76Fe0.19Al0.1Ox and (SrCo0.8Fe0.2O3-delta)0.95(SrAl2O4)0.05 mixed-conducting membranes. Journal of American Ceramic Society. 96 (4): pp. 1285-1291.
    Source Title
    Journal of American Ceramic Society
    DOI
    10.1111/jace.12248
    ISSN
    0002-7820
    URI
    http://hdl.handle.net/20.500.11937/25462
    Collection
    • Curtin Research Publications
    Abstract

    Dense oxygen permeable ceramic membranes are promising materials for separating oxygen from air and for syngas production. The crystal structure, oxygen vacancy, microstructure, thermal expansion behavior, electrical conductivity, and oxygen permeability of two mixed-conducting ceramics: 5 mol% SrAl2O4-doped SrCo0.8Fe0.2O3-delta (SCF-SA) and SrCo0.76 Fe0.19Al0.1Ox (SCFA), with the same overall cation composition, were systematically investigated in this work. The main phases of SCFA and SCF-SA are cubic perovskite and no orthorhombic brown millerite appears from 700°C to 900°C in air, while SCF-SA presents minor unidentified phases. SCF-SA shows lower electrical conductivity than SCFA. SCFA membranes exhibit lower oxygen permeation flux than SCF-SA. At 850°C, the oxygen permeation fluxes of SCFA and SCF-SA are 1.23 and 1.46 mL/cm2/min, respectively, under the oxygen partial pressure gradient of 0.21 x 10^5/1 3 10^2 Pa.

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