Oxygen Permeation Properties of La0.7Sr0.3Co0.3Fe0.7O3-delta Membrane

被引：0

作者：

Son, Sou Hwan ^{[1
]}

Kim, Jong-Pyo ^{[2
]}

Park, Jung Hoon ^{[1
]}

Lee, Yongtaek ^{[2
]}

机构：

[1] Korea Inst Energy Res, 71-2 Jang Dong, Daejeon 305343, South Korea

[2] Chungnam Natl Univ, Dept Chem Engn, Daejeon 305764, South Korea

来源：

KOREAN CHEMICAL ENGINEERING RESEARCH | 2009年 / 47卷 / 03期

关键词：

Ceramic Membrane; Perovskite; Electrical Conductivity; Oxygen Permeation;

D O I：

暂无

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Perovskite-type ceramic powder, La0.7Sr0.3Co0.3Fe0.7O3-delta, have been synthesized successfully by the citrate method. As a result of TGA for precursor, metal-citrate complex in precursor was decomposed in the temperature range of 150650 degrees C. XRD analysis showed the single perovskite structure was observed over 1,000 degrees C without impurities. Typical dense membrane with 1.6 mm thickness has been prepared using as-prepared powder by pressing unilaterally and sintering at 1,300 degrees C. The electrical conductivity of La0.7Sr0.3Co0.3Fe0.7O3-delta membrane increased with increasing temperature at atmosphere of air and then decreased over 600 degrees C due to oxygen loss from the crystal lattice. The oxygen flux of La0.7Sr0.3Co0.3Fe0.7O3-delta membrane in the range of 700 to 950 degrees C increased with the increasing temperature from 0.045 to 0.415 ml/cm(2).min. The activation energy for oxygen permeation was calculated to be 89.17 kJ/mol.

引用

页码：310 / 315

页数：6

共 6 条

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