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Dense ceramic membranes with protonic and electronic conductivity have attracted considerable interest in recent years.In this paper,the powders of SrCe_(0.75)Zr_(0.20)Tm_(0.05)O_(3-δ) were synthesized via the liquid citrate method,and the membranes of SrCe_(0.75)Zr_(0.20)Tm_(0.05)O_(3-δ) were prepared by pressing followed by sintering.X-ray diffraction(XRD) was used to characterize the phase structure of both the powder and sintered membrane.The microstructure of the sintered membranes was studied by scanning electron microscopy(SEM).Hydrogen permeation through the SrCe_(0.75)Zr_(0.20)Tm_(0.05)O_(3-δ) membranes was carried out using gas permeation setup at 900℃.Hydrogen permeation flux of SrCe_(0.75)Zr_(0.20)Tm_(0.05)O_(3-δ) membrane reaches up to 0.042 mL/ min cm~2 at H_2 partial pressure of 0.4 atm.The hydrogen permeation fluxes obtained in this paper are similar to that of SrCe_(0.95)Tm_(0.05)O_(3-δ),and Zr doping can increase mechanical strength of SrCe_(0.75)Zr_(0.20)Tm_(0.05)O_(3-δ) membranes and the resistance to reducing circumstance.
Dense ceramic membranes with protonic and electronic conductivity have a considerable interest in recent years.In this paper, the powders of SrCe_ (0.75) Zr_ (0.20) Tm_ (0.05) O_ (3-δ) were synthesized via the liquid citrate method, and The membranes of SrCe_ (0.75) Zr_ (0.20) Tm_ (0.05) O_ (3-δ) were prepared by pressing followed by sintering. X-ray diffraction (XRD) was used to characterize the phase structure of both the powder and sintered membrane . The microstructure of the sintered ceramic was studied by scanning electron microscopy (SEM). Hydrogen permeation through the SrCe_ (0.75) Zr_ (0.20) Tm_ (0.05) O_ (3-δ) Hydrogen permeation flux of SrCe_ (0.75) Zr_ (0.20) Tm_ (0.05) O_ (3-δ) membrane reaches up to 0.042 mL / min cm ~ 2 at H_2 partial pressure of 0.4 atm.The hydrogen permeation fluxes obtained in this paper (0.95) Tm_ (0.05) O_ (3-δ), and Zr doping can increase mechanical strength of SrCe_ (0.75) Zr_ (0.20) Tm_ (0 .05) O_ (3-δ) membranes and the resistance to reducing circumstance.