Cobalt-free perovskite-type oxides Ba Fe_(1-y)Ta_yO_(3-δ)(0 ≤ y ≤ 0.2)were synthesized via a simple solid state reaction.The cubic perovskite structure can be obtained when y is over 0.1.Ba Fe_(0.9)Ta_(0.1)O_(3-δ)(BFT0.1)membrane shows the highest oxygen permeation flux,which can reach 1.6 ml·min~(-1)·cm~(-2)at 950 °C under the gradient of air/He.The O_2-TPD results reveal that Ba Fe_(0.9)Ta_(0.1)O_(3-δ)material shows an excellent reversibility and phase structure stability in air.The oxygen permeation flux is limited by the bulk diffusion when the membrane thickness is over 0.8 mm,and it is limited by both the bulk diffusion and the surface exchange when the membrane thickness is below 0.5 mm.Stable oxygen permeation fluxes are obtained during 180 h operation. Cobalt-free perovskite-type oxides Ba Fe_ (1-y) Ta_yO_ (3-δ) (0 ≤ y ≤ 0.2) were synthesized via a simple solid state reaction. The cubic perovskite structure can be obtained when y is over 0.1 Ba Fe 0.9 Ta 0.1 O 3 - δ (BFT 0.1) membrane shows the highest oxygen permeation flux, which can reach 1.6 ml · min -1 cm -2 at 950 ° C under the gradient of air / He. O 2 -TPD results reveal that Ba Fe_ (0.9) Ta_ (0.1) O_ (3-δ) material shows an excellent reversibility and phase structure stability in air. The oxygen permeation flux is limited by the bulk diffusion when the membrane thickness is over 0.8 mm, and it is limited by both the bulk diffusion and the surface exchange when the membrane thickness is below 0.5 mm. Stable oxygen permeation fluxes are 180 during 180 hours operation.