Improved microstructural homogeneity of Ni-BCY cermets membrane via high-energy milling

Hyejin Kim, Kiyong Ahn, Boyoung Kim, Jong Heun Lee, Yong Chae Chung, Hae Ryoung Kim, Jong Ho Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 Y2O 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.

Original languageEnglish
Pages (from-to)648-653
Number of pages6
JournalJournal of the Korean Ceramic Society
Volume49
Issue number6
DOIs
Publication statusPublished - 2012 Nov 1

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Keywords

  • Cermets
  • Hydrogen permeation
  • Membrane
  • Ni-BCY

ASJC Scopus subject areas

  • Ceramics and Composites

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