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- W1714060892 abstract "Abstract A typical dense membrane of perovskite La0.8Sr0.2Co0.2Fe0.8O3−δ have been successfully prepared by citrate method using nitrate salts as cation source and citrate as an organic agent. Precursor of La0.8Sr0.2Co0.2Fe0.8O3−δ was analyzed by thermal gravimetric analysis and XRD to investigate optimum calcination temperature. Organic compound and nitrate burned out below 400°C. Weight loss observed over 700°C is due to decomposition of SrCO3. The recommended temperature for calcination of precursor is over 900°C at which single perovskite powder is obtained without impurities. The electrical property, oxygen permeation and stability of membrane were investigated in the range of 700 to 950°C. The electrical conductivity increased with increasing temperature but then decreased over 850°C (20% O2) and 750°C (1% O2) due to oxygen loss from the crystal lattice. The oxygen flux of La0.8Sr0.2Co0.2Fe0.8O3−δ membrane increased with the increasing temperature. Themaximum oxygen permeation was measured to be 0.19 mL/min cm2 at 950°C. The activation energy for oxygen permeation was calculated to be 78 kJ/mol. Perovskite structure and phase did not change even after permeation test of 40 h." @default.
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- W1714060892 date "2008-12-01" @default.
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- W1714060892 title "Oxygen permeability, electrical property and stability of La0.8Sr0.2Co0.2Fe0.8O3−δ membrane" @default.
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- W1714060892 doi "https://doi.org/10.1016/j.desal.2007.09.045" @default.
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