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Evolution of CaCu3Ti4O12 varistor properties during heat treatment in vacuum

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dc.contributor.authorMarques, V. P. B.
dc.contributor.authorRies, A.
dc.contributor.authorSimoes, A. Z.
dc.contributor.authorRamirez, M. A.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:28:51Z
dc.date.available2014-05-20T15:28:51Z
dc.date.issued2007-01-01
dc.description.abstractCalcium copper titanate (CaCu3Ti4O12) ceramic varistors were prepared by solid-state method. The samples were several times heat treated in vacuum and the evolution of electrical characteristics were monitored by current density versus electric field measurements and impedance spectroscopy. Repeated heat treatments in vacuum (900 degrees C for 1 h, 0.01 Torr) lead to a desorption of oxygen adsorbed at the grain boundaries and consequently to a degradation of the varistor properties. During further successive heat treatments some oxygen from the grain interior moves to the grain boundary thereby partially restoring the varistor properties. (c) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.format.extent1187-1190
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2006.04.003
dc.identifier.citationCeramics International. Oxford: Elsevier B.V., v. 33, n. 7, p. 1187-1190, 2007.
dc.identifier.dimensionspub.1021996141
dc.identifier.doi10.1016/j.ceramint.2006.04.003
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.orcid0000-0002-2976-7964
dc.identifier.orcid0000-0003-2535-2187
dc.identifier.orcid0000-0003-0415-2944
dc.identifier.orcid0000-0002-2681-1579
dc.identifier.orcid0000-0001-8062-7791
dc.identifier.urihttp://hdl.handle.net/11449/38584
dc.identifier.wosWOS:000249191700007
dc.language.isoeng
dc.publisherElsevier B.V.
dc.publisherElsevier
dc.relation.ispartofCeramics International
dc.relation.ispartofjcr3.057
dc.relation.ispartofsjr0,784
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.sourceDimensions
dc.subjectvaristorspt
dc.subjectcalcium copper titanatept
dc.titleEvolution of CaCu3Ti4O12 varistor properties during heat treatment in vacuumen
dc.typeArtigopt
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.author.lattes3573363486614904[3]
unesp.author.orcid0000-0003-2535-2187[3]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentBioquímica e Tecnologia - IQARpt
unesp.departmentFísico-Química - IQARpt

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Araraquara - IQAR - Instituto de Química