SOLID STATE IOlllCS Mixed conducting yttrium-barium-cobalt-oxide for high oxygen permeation
نویسندگان
چکیده
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 Yo.osBaCoo.95Oa_6 and Yo.~oBao.9oCoO3_6 consisted of a BaCoO3_6like main phase and some minor phases. For the Yo.osBaCoo.9503_6 material these minor phases were not exceeding 10 vol%. Yo.osBaCoo.9503_6 had the highest oxygen permeation value of 3.9 × 10 -7 mol/cm 2 s at 900°C; the surface exchange reaction may be the rate limiting step here. The material Yo.33Bao.67CoO3_,~ consisted mainly of two unknown cubic phases.
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