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J. Korean Ceram. Soc. > Volume 49(6); 2012 > Article
Journal of the Korean Ceramic Society 2012;49(6): 648.
doi: https://doi.org/10.4191/kcers.2012.49.6.648
고에너지 밀링을 통한 Ni-BaCe0.9Y0.1O3-δ 서멧 멤브레인의 미세구조 균질성 향상
김혜진, 안기용, 김보영, 이종흔1, 정용재2, 김혜령, 이종호
한국과학기술연구원 고온에너지재료연구센터
1고려대학교 신소재공학과
2한양대학교 신소재공학과
Improved Microstructural Homogeneity of Ni-BCY Cermets Membrane via High-Energy Milling
Hyejin Kim, Kiyong Ahn, Boyoung Kim, Jongheun Lee1, Yong-Chae Chung2, Hae-Ryoung Kim, Jong-Ho Lee
High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology
1Department of Materials Science and Engineering, Korea University
2Department of Materials Science and Engineering, Hanyang University
ABSTRACT
Hybridization of dense ceramic membranes for hydrogen separation with an electronically conductive metallic phase is normally utilized to enhance the hydrogen permeation flux and thereby to increase the production efficiency of hydrogen. In this study, we developed a nickel and proton conducting oxide ($BaCe_{0.9}Y_{0.1}O_{3-{delta}}$: BCY) based cermet (ceramic-metal composites) membrane. Focused on the general criteria in that the hydrogen permeation properties of a cermet membrane depend on its microstructural features, such as the grain size and the homogeneity of the mix, we tried to optimize the microstructure of Ni-BCY cermets by controlling the fabrication condition. The Ni-BCY composite powder was synthesized via a solid-state reaction using $2NiCO_3{cdot}3Ni(OH)_2{cdot}4H_2O$, $BaCeO_3$, $CeO_2$ and $Y_2O_3$ as a starting material. To optimize the mixing scale and homogeneity of the composite powder, we employed a high-energy milling process. With this high-energy milled composite powder, we could fabricate a fine-grained dense membrane with an excellent level of mixing homogeneity. This controlled Ni-BCY cermet membrane showed higher hydrogen permeability compared to uncontrolled Ni-BCY cermets created with a conventionally ball-milled composite powder.
Key words: Ni-BCY, Cermets, Hydrogen permeation, Membrane
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