Chemical reactivity of perovskite oxide SOFC cathodes and yttria stabilized zirconia

Kostogloudis, GC; Tsiniarakis, G; Ftikos, C

dc.contributor.author	Kostogloudis, GC	en
dc.contributor.author	Tsiniarakis, G	en
dc.contributor.author	Ftikos, C	en
dc.date.accessioned	2014-03-01T01:15:30Z
dc.date.available	2014-03-01T01:15:30Z
dc.date.issued	2000	en
dc.identifier.issn	0167-2738	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13548
dc.subject	SOFC	en
dc.subject	perovskite oxide cathodes	en
dc.subject	yttria stabilized zirconia	en
dc.subject	chemical reactivity	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	COMPATIBILITY	en
dc.subject.other	MN	en
dc.subject.other	LA	en
dc.title	Chemical reactivity of perovskite oxide SOFC cathodes and yttria stabilized zirconia	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0167-2738(00)00433-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0167-2738(00)00433-1	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	The chemical reactivity of perovskite oxide SOFC cathodes and yttria stabilized zirconia (YSZ) solid electrolyte was studied. The perovskite oxides that were examined were La1-xSrxCo0.2Mn0.8O3-d, La1-xSrxCo0.2Fe0.8O3-d and La1-xCaxCo0.2Fe0.8O3-d (0 less than or equal to x less than or equal to 0.5), as well as, the A-site deficient oxides La0.6-zSr0.4Co0.2Fe0.8O3-d, La0.6Sr0.4-zCo0.2Fe0.8O3-d and (La0.6Sr0.4)(1-z)Co0.2Fe0.8O3-d (0 less than or equal to z less than or equal to 0.2). Equimolar perovskite/YSZ powder mixtures were prepared and annealed at 1100 degreesC for 120 h. X-ray diffraction analysis was conducted to identify any reaction products. Si-standard was used as an internal standard for d-value calibration, during the determination of the lattice parameter of cubic YSZ. The main reaction products were La2Zr2O7 for the undoped and Lightly doped Fe-containing compositions and (Sr/Ca)ZrO3 for the Sr/Ca doped compositions. Also, CoFe2O4 was formed in the case of the Fe-containing compositions and monoclinic zirconia for La1-xCaxCo0.2Fe0.8O3-d with x = 0.4, 0.5. A-site deficiency in La0.6Sr0.4Co0.2Fe0.8O3-d-based perovskites reduced the amount of SrZrO3 formed, only in the case of La0.6Sr0.4-zCo0.2Fe0.8O3-d with 0 less than or equal to z less than or equal to 0.2 and (La0.6Sr0.4)(1-z)Co0.2Fe0.8O3-d with z=0.2. The lattice parameter of YSZ exhibited a shift, corresponding to a lattice contraction, due to the diffusion of the transition metal cations from the perovskite into YSZ. (C) 2000 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	SOLID STATE IONICS	en
dc.identifier.doi	10.1016/S0167-2738(00)00433-1	en
dc.identifier.isi	ISI:000165856800074	en
dc.identifier.volume	135	en
dc.identifier.issue	1-4	en
dc.identifier.spage	529	en
dc.identifier.epage	535	en