This work is focused on the evaluation of oxygen semi-permeation performances of free cobalt perovskite membrane materials, Ba_1-xSr_xFeO_3-δ perovskites. A wide range of Ba and Sr contents was studied. The best performances were obtained for Ba_0.9Sr_0.1FeO_3-δ perovskite membranes with oxygen fluxes of 4.1 10⁻³ mol.m⁻².s⁻¹ at 850 °C. For a better understanding of the rate determining step of oxygen transport through Ba_1-xSr_xFeO_3-δ perovskite membranes (with x = 0.1, 0.5, and 0.7), the oxygen diffusion and oxygen desorption coefficients were determined using a specific method based on oxygen semi-permeation.

中文翻译：

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Ba _1-x Sr _x FeO3 _-δ钙钛矿膜的氧半渗透性能

这项工作的重点是评估游离钴钙钛矿膜材料Ba _1-x Sr _x FeO3 _-δ钙钛矿的氧半渗透性能。研究了广泛的Ba和Sr含量。对于Ba _0.9 Sr _0.1 FeO3 _-δ钙钛矿膜，在850°C下的氧通量为4.1 10 ^-3  mol.m ^-2 .s ^-1时，可获得最佳性能。为了更好地了解氧气通过Ba _1-x Sr _x FeO3 _-δ传输的速率确定步骤 钙钛矿膜（x = 0.1、0.5和0.7），使用基于氧半渗透的特定方法确定氧扩散系数和氧解吸系数。