| $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-delta}$ 산소 투과 분리막의 제조 및 특성 |
| 임경태, 이기성1, 한인섭1, 서두원1, 홍기석1, 배강1, 우상국1, 조통래 |
충남대학교 금속공학과
1한국에너지기술연구원 에너지재료연구팀 |
| Fabrication and Characterization of $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-delta}$ Oxygen Permeation Membranes Prepared with Different Powders |
| Kyoung-Tae Lim, Kee-Sung Lee1, In-Sub Han1, Doo-Won Seo1, Kee-Seog Hong1, Kang Bai1, Sang-Kuk Woo1, Tong-Lae Cho |
Department of Metallurgical Engineering, Chungnam National University
1Korea Institute of Energy Research |
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| ABSTRACT |
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We synthesized $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-delta}$ powders by coprecipitation, citration and solid-state reactions. The oxygen permeation membranes were fabricated by cold isostatic pressing of the synthesized powders, followed by sintering in air. All powders and membranes consist of perovskite phases. The coprecipitated powders showed the highest surface area ($7.5m^2/g$) but strontium deficiency was found during washing and filtering in the process. The membrane with lower relative density was fabricated by citration method. On the other hand, solid state reacted powders had high relative density (95%), and mechanical properties showed superior properties. Especially, the composition of the solid-state reacted powders was relatively well-controlled. |
| Key words:
Oxygen permeation membrane, Perovskite-type ceramic, Mixed conductor |
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