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Citation: ZHANG Heng, WANG Ting-Ting, LIN Wei-Ming. Stability of SrFe_0.6Cu_0.3Ti_0.1O_3-δ Mixed Conducting Membrane Material[J]. Chinese Journal of Applied Chemistry, ;2009, 26(11): 1328-1331. shu

Stability of SrFe_0.6Cu_0.3Ti_0.1O_3-δ Mixed Conducting Membrane Material

1.
a School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165;
2.
b Guangzhou University, Guangzhou

Corresponding author: ZHANG Heng,
Received Date: 8 October 2008
Available Online: 2 March 2009
Fund Project: 广东省自然科学基金(030514) (030514)广东省科技计划(2004B33401006)资助项目 (2004B33401006)

SrFe(Cu,Ti)O_3-δ mixed conducting membrane materials were synthesized by citric acid complexing method.The stabilities of the materials were studied by means of XRD,O₂-TPD,H2-TPR and SEM.It was found that phase decomposition occurred in SrFe_0.7Cu_0.3O_3-δ under a low oxygen partial pressure and a minor phase SrCuO₂ was formed.The addition of Ti⁴⁺ greatly enhanced the structure stability of the material,and SrFe_0.6Cu_0.3Ti_0.1O_3-δ maintained single-phased perovskite structure.H₂-TPR and O₂-TPD results showed that the addition of Ti⁴⁺ increased the initial oxygen desorption temperature of the material,and the reduction temperature of the other metal ions.Slight phase decomposition was found on the He-side surface of SrFe_0.6Cu_0.3Ti_0.1O_3-δ membrane after oxygen permeating test and fresh small grains congregated at the boundary of the initial grains.SrFe_0.6Cu_0.3Ti_0.1O_3-δ exhibits a high stability during 66 h oxygen permeating process.
- oxygen permeation,
- mixed conductor,
- perovskite,
- phase stability
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Stability of SrFe_0.6Cu_0.3Ti_0.1O_3-δ Mixed Conducting Membrane Material