Fabrication of BSCF-based mixed ionic-electronic conducting membrane by electrophoretic deposition for oxygen separation application |
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| Affiliation: | 1. National Institute for Material Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;2. Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 8, Nishi 5, Kita-ku, Sapporo, Hokkaido, 060-0808, Japan;3. National Institute of Advanced Industrial Science and Technology, 2266-98 Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya, Aichi 463-8560, Japan;4. Saint-Gobain Research Provence, 550 Avenue Alphonse Jauffret 84300 Cavaillon, France;1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;2. Department of Chemistry and Bioscience, Aalborg University, DK-9220, Denmark;3. School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China;4. Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China;1. Beijing Advanced Innovation Center for Materials Genome Engineering, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China;2. X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA;1. RISE IVF AB, Argongatan 30, SE-431 22 Mölndal, Sweden;2. RISE ETC AB, Industrigatan 1, SE-941 38, Piteå, Sweden;3. Kanthal AB, Box 502, SE-734 27 Hallstahammar, Sweden;1. Ceramics Synthesis and Functionalization Lab, UMR 3080 CNRS/Saint-Gobain, F-84306 Cavaillon, France;2. Institut Europeen des Membranes, Universite de Montpellier 2, Place Eugene Bataillon, 34095 Montpellier Cedex 5, France |
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| Abstract: | Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF), which exhibits a high mixed oxide ionic-electronic conduction, was used for the fabrication of an oxygen separation membrane. An asymmetric structure, which was a thin and dense BSCF membrane layer supported on a porous BSCF substrate, was fabricated by the electrophoretic deposition method (EPD). Porous BSCF supports were prepared by the uniaxial pressing method using a powder mixture with BSCF and starch as the pore-forming agent (0–50 wt.%). The sintering behaviors of the porous support and the thin layer were separately characterized by dilatometry to determine the co-fired temperature at which cracking did not occur. A crack-free and thin dense membrane layer, which had about a 15 μm thickness and >95% relative density, was obtained after optimizing the processes of EPD and sintering. The dense/porous interface was well-bonded and the oxygen permeation flux was 2.5 ml (STP) min?1 cm-2 at 850 °C. |
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| Keywords: | Mixed ionic-electronic conductor Oxygen separation Asymmetric membrane Electrophoretic deposition |
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