Mixed conducting yttrium-barium-cobalt-oxide for high oxygen permeation

H.W. Brinkman, H. Kruidhof, A.J. Burggraaf

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Abstract

Yttrium-barium-cobalt-oxide (YBC), especially with low Y content, has been prepared. Oxygen permeation in these materials is very high at moderate temperature. The materials Y0.05BaCo0.95O3-δ and Y0.10Ba0.90CoO3-δ consisted of a BaCoO3-δ like main phase and some minor phases. For the Y0.05BaCo0.95O3-δ material these minor phases were not exceeding 10 vol%. Y0.05BaCo0.95O3-δ had the highest oxygen permeation value of 3.9 × 10-7 mol/cm2s at 900°C; the surface exchange reaction may be the rate limiting step here. The material Y0.33Ba0.67CoO3-δ consisted mainly of two unknown cubic phases.
Original languageEnglish
Pages (from-to)173-176
Number of pages4
JournalSolid state ionics
Volume68
Issue number3-4
DOIs
Publication statusPublished - 1994

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