Oxygen permeation through oxygen ion oxide-noble metal dual phase composites

C.S. Chen*, H. Kruidhof, H.J.M. Bouwmeester, H. Verweij, A.J. Burggraaf

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

58 Citations (Scopus)
78 Downloads (Pure)

Abstract

Oxygen permeation behaviour of three composites, yttria-stabilized zirconia-palladium, erbia-stabilized bismuth oxidenoble metal (silver, gold) was studied. Oxygen permeation measurements were performed under controlled oxygen pressure gradients at elevated temperatures. Air was supplied at one side of a dense sintered disk specimen, while helium was fed at the opposite side to sweep away the permeated oxygen. This research has demonstrated that in addition to the presence of percolative metal phase in the oxide matrix, a large ionic conductivity of the oxide phase and a high catalytic activity of the metal phase towards surface oxygen exchange are required for the dual phase composite to possess high oxygen permeability. The bismuth oxide-silver composite fulfils these requirements, hence showing the best oxygen permeability.
Original languageEnglish
Pages (from-to)569-572
Number of pages4
JournalSolid state ionics
Volume86-88
Issue numberPart 1
DOIs
Publication statusPublished - 1996

Keywords

  • Dual phase composites
  • Oxygen permeation
  • Ion conductivity

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