Citation: Yan Ying Wei, Ling Yi Zhou, Jun Tang, Zhong Li, Hai Hui Wang. Activation in the initial stage of oxygen permeation in SrCo_0.9Ta_0.1O_3-δ[J]. Chinese Chemical Letters, ;2012, 23(1): 113-116. doi: 10.1016/j.cclet.2011.09.020 shu

Activation in the initial stage of oxygen permeation in SrCo_0.9Ta_0.1O_3-δ

School of Chemistry & Chemical Engineering, South China. University of Technology, Guangzhou 510640, China

Received Date: 1 June 2011

Fund Project: The authors greatly acknowledge the financial support by Natural Science Foundation of China (Nos. U0834004 and 20936001), the Science-Technology Plan of Guangzhou City (No. 2009J1-C511-1) and the Fundamental Research Funds for the Central Universities, SCUT (No. 2009220038).

Mixed conducting perovskite oxide SrCo_0.9Ta_0.1O_3-δ (SCT) is synthesized by solid-state reaction method. The activation in the initial stage of oxygen permeation through the SCT membrane is investigated. The results show that the activation in the initial stage of oxygen permeation has activate-memory, the first activation can only help to reduce active time of the next cycles, but it is helpless to increase the final oxygen permeation flux. XRD characterization shows that the imperfect perovskite phase structure is gradually improved and the crystal lattice has made some self-adjustment under the permeation conditions, therefore, the oxygen permeation flux of SCT disk membrane increases gradually and till it reaches a steady state.
- Membrane,
- Perovskite,
- Activation,
- Unsteady state,
- Crystal structure
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