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dc.contributor.authorZamudio-García, Javier
dc.contributor.authorDos-Santos-Gómez, Lucía
dc.contributor.authorPorras-Vázquez, José Manuel 
dc.contributor.authorRamírez-Losilla, Enrique 
dc.contributor.authorMarrero-López, David 
dc.date.accessioned2023-12-21T10:13:40Z
dc.date.available2023-12-21T10:13:40Z
dc.date.created2023-12-18
dc.date.issued2020-01-01
dc.identifier.urihttps://hdl.handle.net/10630/28444
dc.description.abstractRecent studies have reported that the conductivity of La2Ce2O7 proton conductors is improved by aliovalent doping, despite the high concentration of oxygen vacancies in the pristine material. In this study, we provide new insights into the structural and conducting properties of La2-x AxCe2O7±d (A ¼ Naþ, Ca2þ, Sr2þ, Ba2þ, Y3þ and W6þ; x 0.2). The materials are apparently single phase compounds with a disordered fluorite-type structure by conventional X-ray diffraction; however, the local structure, studied by Raman spectroscopy, reveals a biphasic mixture of fluorite and C-type phases, which depends on dopant type and the sintering temperature. In addition, phase segregations are observed for Ca, Sr and Ba-doped samples by scanning electron microscopy. The different substitutions do not improve the bulk conduction at low temperature, and the conductivity differences between the samples are mainly ascribed to microstructural changes. High sintering temperatures produce a significant reduction of the bulk conductivity, i.e. 1.38 and 1.01 mS cm 1 at 300 C for samples sintered at 1400 and 1500 C, respectively. The use of Zn as sintering aid greatly improves the densification of La2Ce2O7 at lower temperature, without affecting negatively the conductivity.es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectElectrólitos - Conductividades_ES
dc.subjectProtoneses_ES
dc.subject.otherProton conductivityes_ES
dc.subject.otherLa2Ce2O7es_ES
dc.titleDoping effects on the structure and electrical properties of La2Ce2O7 proton conductors.es_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.centroFacultad de Cienciases_ES
dc.identifier.doi10.1016/j.jallcom.2019.152600
dc.rights.ccAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.type.hasVersioninfo:eu-repo/semantics/submittedVersiones_ES


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