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Fabrication of BSCF-based mixed oxide ionic-electronic conducting multi-layered membrane by sequential electrophoretic deposition process |
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| Authors: | Kento Ishii Chika Matsunaga Kiyoshi Kobayashi Adam J Stevenson Caroline Tardivat Tetsuo Uchikoshi |
| 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 |
| Abstract: | The Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF)-based multi-layered oxygen separation membrane was fabricated by the sequential electrophoretic deposition (EPD) process. A thin porous/dense bi-layer of BSCF was formed on a thick porous support of BSCF. The porous support prepared by a sacrificial template method using BSCF powder mixed with wheat starch (30 wt%) as a pore-forming agent, followed by uniaxial pressing and low-temperature sintering, was directly used as an EPD electrode. A thin BSCF layer was first formed on the porous support, and then a thin BSCF + PMMA (polymethyl methacrylate) layer was sequentially formed on the thin BSCF layer using a bimodal suspension of BSCF and PMMA. A 30-μm thin porous/dense bi-layer of BSCF of which the total thickness was obtained by optimizing the processes of EPD and subsequent co-sintering. The oxygen separation performance of 3.7 ml (STP) min?1 cm?2 at 860 °C was achieved for the BSCF-based multi-layered oxygen separation membrane. |
| Keywords: | Electrophoretic deposition Co-sintering Mixed ionic-electronic conductor Oxygen separation Asymmetric membrane |
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