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dc.creatorNeilsen, Grace
dc.creatorRosen, Peter
dc.creatorDickson, Matthew
dc.creatorPopović, Marko
dc.creatorSchliesser, Jacob
dc.creatorHansen, Lee
dc.creatorNavrotsky, Alexandra
dc.creatorWoodfield, Brian
dc.date.accessioned2023-04-19T09:44:57Z
dc.date.available2023-04-19T09:44:57Z
dc.date.issued2020
dc.identifier.issn1359-6454
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/6064
dc.description.abstractIt has been previously reported in the literature that the vacancy concentration in a solid can be estimated using the linear term derived from low temperature heat capacity measurements. This paper investigates how such a model performs in both random and partially clustered vacancy systems. The heat capacity measurements were used to investigate the effect of singly (Nd or Sm) doped and co-doped (Nd and Sm) ceria, where simultaneous doping affects vacancy clustering and ionic conductivity. Comparison of calculated vacancy concentrations with sample stoichiometries showed that a vacancy concentration based on the linear term in the low temperature heat capacity is quantitative for near randomly distributed vacancies at low dopant concentration, but the prediction is low by approximately an order of magnitude when vacancies become clustered at higher dopant levels. This confirms that the linear term in the low-temperature heat capacity for non-metallic materials is a viable approach to estimate the vacancy concentration for randomly distributed vacancies which, in turn, can be used to distinguish between the random versus clustered vacancies.sr
dc.language.isoensr
dc.publisherElseviersr
dc.relationU.S. Department of Energy under grant DE-SC0016446sr
dc.relationU.S. Department of Energy under grant DE-SC0016573sr
dc.relationU.S. Department of Energy under grant DE-FG02-03ER46053sr
dc.rightsrestrictedAccesssr
dc.sourceActa Materialiasr
dc.subjectSOFCsr
dc.subjectVacancy clusteringsr
dc.subjectCerium oxidesr
dc.subjectSpecific heatsr
dc.subjectLattice defectssr
dc.titleQuantifying oxygen vacancies in neodymium and samarium doped ceria from heat capacity measurementssr
dc.typearticlesr
dc.rights.licenseARRsr
dc.rights.holderActa Materialia Inc. Published by Elsevier Ltd.sr
dc.citation.volume188
dc.citation.spage740
dc.citation.epage744
dc.citation.rankaM21
dc.identifier.doi10.1016/j.actamat.2020.02.055
dc.identifier.scopus2-s2.0-85080985627
dc.type.versionpublishedVersionsr


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