Structure Stability and Oxygen Permeability of Perovskite-type Oxides of Ba0.5Sr0.5Co0.8Fe0.1R0.1O3-δ （R=Al, Mn, Fe, Ce, Cr, Ni, Co）

• Published in: 材料科学技术学报：英文版 2012, Vol.28 (2), p.177-183
• Main Author: Ensieh Ganji Babakhani Jafar Towfi ghi Laleh Shirazi All Nakhaeipour Akbar Zamaniyan Zahra Shafiei
• Format: Article
• Language: English
• Subjects: O2-TPD; X射线衍射仪; 氧化物膜; 氧渗透; 热重差热分析; 程序升温脱附; 结构稳定性; 钙钛矿型复合氧化物
• ISSN: 1005-0302; 1941-1162

Perovskite-type a0.5Sr0.5Co0.8Fe0.1R0.1O3-δ （R=Al, Mn, Fe, Ce, Cr, Ni, Co） oxide membranes were ex- ploited and synthesized. Oxygen behavior, order-disorder transition and phase stability of these composite oxides were investigated by combined analysis of X-ray diffraction （XRD）, temperature programmed desorp- tion （TPD）, thermogravimetric-differential thermal analysis （TG-DTA）. Oxygen permeation through these membranes was studied by the gas chromatography （GC） method using a high-temperature permeation cell in a wide temperature range from 700 to 950℃. High permeation fluxes were observed for these materials. The high permeation flux was about 3.19 ml.min-l.cm-2 under air/He gradients at 950℃, which was achieved for a0.5Sr0.5Co0.8Fe0.1R0.1O3-δ（BSCFNiO） membrane. The results of analysis showed no phase transition for BSCFNiO oxide with increasing temperature and XRD pattern of this material after O2-TPD indicated to sustain a pure perovskite structure after oxygen permeation process.