Fabrication of BSCF-based mixed ionic-electronic conducting membrane by electrophoretic deposition for oxygen separation application. Issue 16 (December 2019)

• 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 39:Issue 16(2019)
• Page Start: 5292
• Page End: 5297
• Publication Date: 2019-12
• Subjects: Mixed ionic-electronic conductor -- Oxygen separation -- Asymmetric membrane -- Electrophoretic deposition; 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.2019.07.051
• Languages: English
• ISSNs: 0955-2219

Abstract

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