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Thermogravimetric study on perovskite-like oxygen permeation ceramic membranes |
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| Authors: | Jie Hu Haoshan Hao Changping Chen Delin Yang Xing Hu |
| Institution: | aSchool of Physical Engineering and Material Physics Laboratory, Zhengzhou University, Zhengzhou 450052, PR China bHenan Textile College, Zhengzhou 450007, PR China |
| Abstract: | The oxygen permeation properties of mixed-conducting ceramics SrFeCo0.5O3?δ (SFCO), Ba0.5Sr0.5Co0.8Fe0.2O3?δ (BSCFO), La0.2Sr0.8Co0.8Fe0.2O3?δ (LSCFO) and Ba0.95Ca0.05Co0.8Fe0.2O3?δ (BCCFO) were studied by thermogravimetric method in the temperature range 600–900 °C. The results show that the oxygen adsorption rate constants ka of all material are larger than oxygen desorption rate constants kd and both ka and kd are not strongly dependent on temperature in the studied temperature range. The oxygen vacancy contents δ(N2) and δ(O2) in nitrogen and oxygen and their difference Δδ = δ(N2) ? δ(O2) play an important role in determining the temperature behavior of oxygen permeation flux JO2. |
| Keywords: | Mixed-conducting membrane Perovskite-like structure Thermogravimetric Oxygen permeation |
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