Fabrication of BSCF-based mixed oxide ionic-electronic conducting multi-layered membrane by sequential electrophoretic deposition process. Issue 4 (April 2021)

• Record Type: Journal Article
• Authors: Ishii, Kento; Matsunaga, Chika; Kobayashi, Kiyoshi; Stevenson, Adam J.; Tardivat, Caroline; Uchikoshi, Tetsuo
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 4(2021)
• Page Start: 2709
• Page End: 2715
• Publication Date: 2021-04
• Subjects: Electrophoretic deposition -- Co-sintering -- Mixed ionic-electronic conductor -- Oxygen separation -- Asymmetric membrane; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2020.11.024
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The Ba0.5 Sr0.5 Co0.8 Fe0.2 O3-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.