The oxygen permeation characteristics of Bi1 - xSrxFeO3 mixed ionic and electronic conducting ceramics
The oxygen permeation characteristics of Bi1 - xSrxFeO3 mixed ionic and electronic conducting ceramics
复制标题
DOI：
10.1016/j.ssi.2009.11.016
复制
发表时间：
2010-02-08
影响因子：
3.2
通讯作者：
Takamura, H.
中科院分区：
文献类型：
--
作者：
Brinkman, K.;Iijima, T.;Takamura, H.
Bi-1 (-) xSrxFeO3-delta（x = 0.05、0.15、0.3、0.6 和 0.8）系统中的钙钛矿氧化物在中间温度范围（650 至 800 摄氏度）下通过氧渗透和电导率测量进行了表征。样品表现出单相钙钛矿结构，晶格常数随着 Sr 浓度的增加而减小，并且在 x >= 0.3 时结构从菱形六面体转变为立方体。对于 x = 0.8 的组合物，在所有样品中都证实了混合电导率，在 800 摄氏度下最大通量水平约为 0.11 μmol/cm(2) s。研究的材料在渗透测量中存在的氧分压范围（0.21 至 10(-6) atm）内显示出 p 型电导率。在 x = 0.3 附近发现氧通量和离子电导率的局部最大值。 (C) 2009 Elsevier B.V. 保留所有权利。
The perovskite oxides in the system Bi-1 (-) xSrxFeO3-delta (x = 0.05, 0.15, 0.3. 0.6, and 0.8) were characterized in the intermediate temperature range (650 to 800 degrees C) by oxygen permeation and electrical conductivity measurements. The samples exhibited a single phase perovskite structure with a decreasing lattice constant with increasing Sr concentration and a structural change from rhombohedral to cubic at x >= 0.3. Mixed conductivity was confirmed in all samples with maximum flux levels on the order of 0.11 mu mol/cm(2) s at 800 degrees C for the x = 0.8 composition. Materials studied displayed p-type conductivity over the oxygen partial pressure range present in permeation measurements (0.21 to 10(-6) atm). A local maximum of oxygen flux and ionic conductivity was found near x = 0.3. (C) 2009 Elsevier B.V. All rights reserved.