Kim, Hyejin Kim, Boyoung Lee, Jongheun Ahn, Kiyong Kim, Hae-Ryoung Yoon, Kyung Joong Kim, Byung-Kook Cho, Young Whan Lee, Hae-Weon Lee, Jong-Ho 2024-01-20T10:03:16Z 2024-01-20T10:03:16Z 2021-09-05 2014-04 0272-8842 https://pubs.kist.re.kr/handle/201004/126956 Dense ceramic membranes are usually hybridized with an electronically conductive metallic phase to enhance their hydrogen permeation fluxes, thereby increasing the hydrogen-production efficiency of hydrogen separation membranes. Herein, the hydrogen-separation properties of membranes fabricated from cermets containing BaCe0.9Y0.1O3-delta (BCY) as the proton-conducting ceramic phase and Ni as the electronic-conducting metal phase were investigated with respect to the compositions of the Ni-BCY mixture. Because the hydrogen permeability of a cermet membrane is seriously affected by rnicrostructural parameters such as grain size and homogeneity of the cermet mixture used to fabricate it, we tried to optimize the microstructures and compositions of the Ni-BCY cermets by controlling their fabrication conditions. A high-energy milling process was employed to fabricate fine-grained, dense membranes that exhibited high levels of mixing homogeneity. From the adjustment of composition and microstructure of Ni-BCY composites, the hydrogen permeability of Ni-BCY cermet membranes can be significantly increased so that hydrogen fluxes of similar to 0.76 cm(3)/(min cm(2)) at 800 degrees C can be achieved. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved. English ELSEVIER SCI LTD PROTON CONDUCTORS GAS GENERATION SEPARATION Microstructural adjustment of Ni-BaCe0.9Y0.1O3-delta cermet membrane for improved hydrogen permeation Article 10.1016/j.ceramint.2013.08.066 1 CERAMICS INTERNATIONAL, v.40, no.3, pp.4117 - 4126 CERAMICS INTERNATIONAL 40 3 4117 4126 scie scopus 000331017500036 2-s2.0-84891372973 Materials Science, Ceramics Materials Science Article PROTON CONDUCTORS GAS GENERATION SEPARATION Ceramic membranes Proton conductor Cermets Hydrogen permeation High-energy milling