Characterization of Nd1-xSrxMnO3± δ SOFC cathode materials

Kostogloudis, GC; Ftikos, C

dc.contributor.author	Kostogloudis, GC	en
dc.contributor.author	Ftikos, C	en
dc.date.accessioned	2014-03-01T01:48:31Z
dc.date.available	2014-03-01T01:48:31Z
dc.date.issued	1999	en
dc.identifier.issn	09552219	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25505
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0032663843&partnerID=40&md5=7ef2f67a0f56be701cd5126898928a96	en
dc.subject	CeO2.	en
dc.subject	Electrical conductivity	en
dc.subject	Fuel cells	en
dc.subject	Thermal expansion	en
dc.subject.other	Cathodes	en
dc.subject.other	Ceramic materials	en
dc.subject.other	Cesium compounds	en
dc.subject.other	Crystal lattices	en
dc.subject.other	Electric conductivity of solids	en
dc.subject.other	Electrolytes	en
dc.subject.other	Fuel cells	en
dc.subject.other	Semiconductor doping	en
dc.subject.other	Strontium	en
dc.subject.other	Thermal expansion	en
dc.subject.other	Cathode materials	en
dc.subject.other	Cesium dioxide	en
dc.subject.other	Chemical compatibility	en
dc.subject.other	Neodymium strontium manganese oxide	en
dc.subject.other	Solid oxide fuel cell	en
dc.subject.other	Perovskite	en
dc.title	Characterization of Nd1-xSrxMnO3± δ SOFC cathode materials	en
heal.type	journalArticle	en
heal.publicationDate	1999	en
heal.abstract	The crystal structure, thermal expansion behavior and electrical conductivity of Nd1-xSrxMnO3±δ (x=0-0·5) perovskite oxides were investigated. The chemical compatibility of the compositions with 40 and 50mol% Sr with Gd2O3 doped CeO2 (CGO) electrolyte was also studied. An orthorhombic GdFeO3-type symmetry (space group Pbnm, z=4) was identified for all perovskite oxides, and the lattice parameters were determined. As the level of Sr doping increases, the pseudo-cubic lattice constant decreases, and the thermal expansion coefficient increases. The electrical conductivity can be described by the small polaron hopping conductivity model. The conductivity increases on increasing Sr doping, while the activation energy decreases. The compositions with 40 and 50mol% Sr show very good thermal expansion and chemical compatibility with CGO electrolyte and can be considered as candidate intermediate temperature solid oxide fuel cell cathode materials.	en
heal.journalName	Journal of the European Ceramic Society	en
dc.identifier.volume	19	en
dc.identifier.issue	4	en
dc.identifier.spage	497	en
dc.identifier.epage	505	en