Perovskite-type Ba0.5Sr0.5Co0.8Fe0.1R0.1O3-δ (R=Al, Mn, Fe, Ce, Cr, Ni, Co) oxide membranes were exploited and synthesized. Oxygen behavior, orderisorder transition and phase stability of these composite oxides were investigated by combined analysis of X-ray diffraction (XRD), temperature programmed desorption (TPD), thermogravimetric-differential thermal analysis (TG-DTA). Oxygen permeation through these membranes was studied by the gas chromatography (GC) method using a high-temperature permeation cell in a wide temperature range from 700 to 950 °C. High permeation fluxes were observed for these materials. The high permeation flux was about 3.19 ml?min-1?cm-2 under air/He gradients at 950 °C, which was achieved for Ba0.5Sr0.5Co0.8Fe0.1O3-δ (BSCFNiO) membrane. The results of analysis showed no phase transition for BSCFNiO oxide with increasing temperature and XRD pattern of this material after O2-TPD indicated to sustain a pure perovskite structure after oxygen permeation process.
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