Novel bifunctional tantalum and bismuth co-doped perovskite BaBi0.05Co0.8Th0.15O3-delta with high oxygen permeation

作者：Liao, Qing; Wang, Yanjie; Chen, Yan; Wei, Yanying; Wang, Haihui^*

来源：Journal of Membrane Science, 2014, 468: 184-191.

DOI：10.1016/j.memsci.2014.06.005

• BaBixCo1-x-yTayO3-delta
• Membrane
• Solid state reaction
• Oxygen permeation
• Bulk diffusion

The BaBixCo1-x-yTayO3-delta (x=y=0; x=0, y=0.15; x=0.05, y=0; x=0.05, y=0.15) oxides were synthesized successfully through a simple solid state reaction method. The oxygen permeation flux through the BaBi0.05Co0.8Ta0.15O3-delta (BBCT) membrane with a 0.8 mm thickness is as high as 3.57 ml/min cm(2) under the gradient of air/He at 950 degrees C. The phase structure of the BaBixCo1-x-yTayO3-delta was characterized by X-ray diffraction (XRD) and oxygen temperature-programmed desorption (O-2-TPD), which reveal that BBCT exhibits a good phase structure stability and reversibility in air atmosphere. The oxygen permeation fluxes through BBCT disk membrane with different thicknesses indicates that the oxygen permeation process is controlled by the bulk diffusion in the temperature ranges of 800-950 degrees C. A stable oxygen permeation flux of 2.2 ml/min cm(2) is achieved during 280 h operation at 900 degrees C, which shows excellent structure stability.

• 出版日期2014-10-15
• 单位华南理工大学