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- W2057982144 abstract "(Ba0.5Sr0.5)1−xCo0.8Fe0.2O3−δ (BSCF) (x = 0–0.3) oxides were prepared by a combined EDTA–citrate complexing method. The crystal structure, electrical conductivity, sintering behavior and oxygen desorption property of the oxides were studied by X-ray diffraction (XRD), four-probe direct current (DC) conductivity, environmental scanning electron microscopy (ESEM) and oxygen temperature-programmed desorption (O2-TPD) technologies, respectively. At x = 0.0–0.15, BSCF had a cubic perovskite structure, the lattice parameter and electrical conductivity both decreased steadily with increasing A-site deficiency. The A-site deficiency resulted in the increasing oxygen vacancy concentration in the lattice structure and improved the sintering of the oxides. BSCF (x = 0.03) showed the highest oxygen permeability with the flux reaching 3.5 × 10−6 mol cm−2 s−1 [STP: standard temperature and pressure] at 900 °C through a 1.0 mm thickness membrane. Long-term stability test of BSCF (x = 0.03) membrane at 850 °C indicated a slight deterioration of the permeation flux, which was attributed in part to the increased A-site deficiency of the bulk from Ba2+ and Sr2+ segregation over the membrane surface." @default.
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- W2057982144 date "2007-12-01" @default.
- W2057982144 modified "2023-10-16" @default.
- W2057982144 title "Properties and performance of A-site deficient (Ba0.5Sr0.5)1−xCo0.8Fe0.2O3−δ for oxygen permeating membrane" @default.
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- W2057982144 doi "https://doi.org/10.1016/j.memsci.2007.09.004" @default.
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