Microstructural development and oxygen ion mobility in Sr, Ba, and Ca-doped LaAlO3 perovskites

dc.contributor.authorVillas-Boas, Lucia Adriana [UNESP]
dc.contributor.authorGoulart, Celso Antonio
dc.contributor.authorFerreira de Souza, Dulcina Pinatti
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2021-06-25T12:20:47Z
dc.date.available2021-06-25T12:20:47Z
dc.date.issued2020-01-01
dc.description.abstractPerovskite-type materials have been extensively investigated in the attempt to find new electrolyte materials for Solid Oxide Fuel Cell that work at low temperatures. Among these materials, LaAlO3 stands out for presenting considerable ionic conductivity when adequately doped. In this work, pure and Sr, Ba, and Ca-doped LaAlO3 were studied. The powders were prepared by solid state reaction. Microstructural, structural and electrical conductivity of sintered samples were analyzed by scanning electron microscopy, X-ray diffraction and impedance spectroscopy, respectively. Among the different kinds of dopants, Sr-doped sample presented the higher conductivity, for both the grain (at 800 degrees C) and total (at 800 degrees C) conductivity. In all doped samples, the total conductivity is controlled by the grain boundary, i.e., the grain boundary is more resistive than the grain, and the microstructures are heterogeneous and the degree of heterogeneity is determined by the dopant.en
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias & Engn, BR-17602496 Tupa, SP, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Engn Mat, Programa Posgrad Ciencia & Engn Mat, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias & Engn, BR-17602496 Tupa, SP, Brazil
dc.format.extent10
dc.identifierhttp://dx.doi.org/10.1590/S1517-707620200003.1101
dc.identifier.citationMateria-rio De Janeiro. Rio De Janeiro Rj: Univ Fed Rio De Janeiro, Lab Hidrogenio, v. 25, n. 3, 10 p., 2020.
dc.identifier.doi10.1590/S1517-707620200003.1101
dc.identifier.fileS1517-70762020000300320.pdf
dc.identifier.issn1517-7076
dc.identifier.scieloS1517-70762020000300320
dc.identifier.urihttp://hdl.handle.net/11449/209511
dc.identifier.wosWOS:000575505100009
dc.language.isopor
dc.publisherUniv Fed Rio De Janeiro, Lab Hidrogenio
dc.relation.ispartofMateria-rio De Janeiro
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectelectrolyte
dc.subjectSOFC
dc.subjectperovskite
dc.subjectlanthanum aluminate
dc.titleMicrostructural development and oxygen ion mobility in Sr, Ba, and Ca-doped LaAlO3 perovskitesen
dc.typeArtigo
dcterms.rightsHolderUniv Fed Rio De Janeiro, Lab Hidrogenio

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