Improved Microstructural Homogeneity of Ni-BCY Cermets Membrane via High-Energy Milling

Title
Improved Microstructural Homogeneity of Ni-BCY Cermets Membrane via High-Energy Milling
Authors
김혜진안기용김보영이종흔정용재김혜령이종호
Keywords
Ni-BCY; Cermets; Hydrogen permeation; Membrane
Issue Date
2012-11
Publisher
Journal of the Korean Ceramic Society; 한국세라믹학회지
Citation
VOL 49, NO 6, 648-653
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 (BaCe0.9Y0.1O3-δ: 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 2NiCO3·3Ni(OH)2·4H2O, BaCeO3, CeO2 and Y2O3 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.
URI
http://pubs.kist.re.kr/handle/201004/44265
ISSN
12297801
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KIST Publication > Article
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