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Effect of Sealant Materials on Oxygen Permeation in Perovskite Oxide Membrane  

Kim, Jong Pyo (Korea Institute of Energy Research, Green House Gas Research Center)
Park, Jung Hoon (Korea Institute of Energy Research, Green House Gas Research Center)
Yoon, Yeoil (Korea Institute of Energy Research, Green House Gas Research Center)
Publication Information
Applied Chemistry for Engineering / v.19, no.4, 2008 , pp. 382-387 More about this Journal
Abstract
$Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ oxide was synthesized by polymerized complex method. Dense membrane of perovskite oxide was prepared using as-prepared powder by pressing and sintering at $1080^{\circ}C$. Leakage test was conducted on the membrane sealed by gold ring, Pyrex ring or Pyrex powder as a sealing material. The oxygen permeation flux of $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ membrane increased with increasing temperature and was $0.74mL/min{\cdot}cm^2$ at $900^{\circ}C$. In the case of the membrane applied by sealing material, oxygen permeation flux of the membrane using gold ring at $950^{\circ}C$ was higher than that using Pyrex materials because the undesired spreading of Pyrex glass materials in the membrane led to the reduction of effective permeation area. Microphotograph analysis results for the membrane after permeation test confirmedthe diffusion of Pyrex glass seal into the membrane.
Keywords
ion transport membrane; perovskite oxides; sealing material; oxygen permeation;
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