Oxygen nonstoichiometry in Pr1-xSrxCo0.2B0.8O3-delta (B = Mn, Fe, x=0.2, 0.4) perovskite oxides

Kostogloudis, GC; Ftikos, C

dc.contributor.author	Kostogloudis, GC	en
dc.contributor.author	Ftikos, C	en
dc.date.accessioned	2014-03-01T01:56:31Z
dc.date.available	2014-03-01T01:56:31Z
dc.date.issued	2007	en
dc.identifier.issn	0955-2219	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28140
dc.subject	perovskites	en
dc.subject	fuel cells	en
dc.subject	thermal properties	en
dc.subject	(Pr,Sr)(Co,Mn)O-3	en
dc.subject.classification	Materials Science, Ceramics	en
dc.subject.other	ELECTRICAL-PROPERTIES	en
dc.subject.other	CRYSTAL-STRUCTURE	en
dc.subject.other	LA1-XSRXCO1-YFEYO3	en
dc.subject.other	SYSTEM	en
dc.title	Oxygen nonstoichiometry in Pr1-xSrxCo0.2B0.8O3-delta (B = Mn, Fe, x=0.2, 0.4) perovskite oxides	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	Thermogravimetric analysis was applied to the study of oxygen nonstoichiometry of perovskite oxides of the compositions Pr0.8Sr0.2CoMn0.8O3-delta and Pr1-xSrxCo0.2Fe0.8O3-delta (v = 0.2, 0.4). The measurements were performed in the temperature range from room temperature to 1200 degrees C in various atmospheres: oxygen, air and argon. The recorded weight loss corresponds to the loss of lattice oxygen. The magnitude of oxygen loss increased and the temperature at which oxygen loss became significant decreased with increasing Sr content. The loss of lattice oxygen became more significant as the oxygen partial pressure decreased. For the same pO(2) and level of Sr doping, the Fe-containing composition became more easily oxygen deficient than the corresponding Mn-containing one, suggesting that Fe is more resistant to oxidation from the trivalent to the tetravalent state than Mn. Electrical conductivity measurements, performed in air, showed that the temperature ranges at which conductivity decrease was observed, correspond fairly well with those ranges where weight loss was detected. (c) 2006 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY	en
dc.identifier.isi	ISI:000242565400037	en
dc.identifier.volume	27	en
dc.identifier.issue	1	en
dc.identifier.spage	273	en
dc.identifier.epage	277	en