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

Kostogloudis, GCh; Ftikos, Ch

dc.contributor.author	Kostogloudis, GCh	en
dc.contributor.author	Ftikos, Ch	en
dc.date.accessioned	2014-03-01T01:26:51Z
dc.date.available	2014-03-01T01:26:51Z
dc.date.issued	2007	en
dc.identifier.issn	09552219	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18261
dc.subject	(Pr,Sr)(Co,Mn)O3	en
dc.subject	Fuel cells	en
dc.subject	Perovskites	en
dc.subject	Thermal properties	en
dc.subject.other	Ceramic materials	en
dc.subject.other	Composition	en
dc.subject.other	Electric conductivity measurement	en
dc.subject.other	Oxidation	en
dc.subject.other	Oxygen	en
dc.subject.other	Praseodymium compounds	en
dc.subject.other	Thermodynamic properties	en
dc.subject.other	Thermogravimetric analysis	en
dc.subject.other	Electrical conductivity measurements	en
dc.subject.other	Nonstoichiometry	en
dc.subject.other	Perovskite	en
dc.subject.other	Ceramic materials	en
dc.subject.other	Composition	en
dc.subject.other	Electric conductivity measurement	en
dc.subject.other	Oxidation	en
dc.subject.other	Oxygen	en
dc.subject.other	Perovskite	en
dc.subject.other	Praseodymium compounds	en
dc.subject.other	Thermodynamic properties	en
dc.subject.other	Thermogravimetric analysis	en
dc.title	Oxygen nonstoichiometry in Pr1-xSrxCo0.2B0.8O3- δ (B = Mn, Fe, x = 0.2, 0.4) perovskite oxides	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jeurceramsoc.2006.02.044	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jeurceramsoc.2006.02.044	en
heal.publicationDate	2007	en
heal.abstract	Thermogravimetric analysis was applied to the study of oxygen nonstoichiometry of perovskite oxides of the compositions Pr0.8Sr0.2Co0.2Mn0.8O3- δ and Pr1-xSrxCo0.2Fe0.8O3- δ (x = 0.2, 0.4). The measurements were performed in the temperature range from room temperature to 1200 °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 pO2 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. © 2006 Elsevier Ltd. All rights reserved.	en
heal.journalName	Journal of the European Ceramic Society	en
dc.identifier.doi	10.1016/j.jeurceramsoc.2006.02.044	en
dc.identifier.volume	27	en
dc.identifier.issue	1	en
dc.identifier.spage	273	en
dc.identifier.epage	277	en