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http://dx.doi.org/10.4191/KCERS.2002.39.10.994

Oxygen Permeation and Mechanical Properties of La0.6Sr0.4Co0.2Fe0.8O3-δ Membrane with Different Microstructures  

Lee, Shi-Woo (Department of Materials Science and Engineering, KAIST)
Lee, Seung-Young (Department of Metallurgical Engineering, Chungnam National University)
Lee, Kee-Sung (Energy Materials Research Team, Korea Institute of Energy Research)
Woo, Sang-Kuk (Energy Materials Research Team, Korea Institute of Energy Research)
Kim, Do-Kyung (Department of Materials Science and Engineering, KAIST)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.10, 2002 , pp. 994-1000 More about this Journal
Abstract
Oxygen permeability and the mechanical properties of mixed ionic-electronic conductive $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-{\delta}}$ perovskite-type membrane, fabricated by solid state reaction, were investigated with regard to microstructure. The microstructure of the membrane was controlled by changing the sintering temperature and holding time. The average grain size and relative density were evaluated as a function of sintering conditions. As the fraction of grain boundary decreased, oxygen permeability showed a tendency to increase. Especially the maximum oxygen flux of 0.37 ml/$cm^2$${\cdot}$min was measured for the specimen sintered at 1300${\circ}C$ for 10 h, which has high density and relatively large grain size. Fracture strength was dependent on the relative density of sintered body, while fracture toughness increased with average grain size.
Keywords
Mixed Ionic-Electronic Conductor(MIEC); $LaSrCoFeO_3$; Perovskite; Oxygen permeable membrane;
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Times Cited By KSCI : 1  (Citation Analysis)
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