Métodos químicos para obtener varistores basados en SnO2

dc.contributor.authorMosquera, A.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorRodríguez-Páez, J. E.
dc.contributor.institutionUniversidad del Cauca
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:22:02Z
dc.date.available2014-05-27T11:22:02Z
dc.date.issued2006-11-01
dc.description.abstractSynthesis of SnO2 ceramic powders was made by coprecipitation method and polymeric precursor method (Pechini) to obtain Sn-Co-Nb-Ti-Al varistor systems. The particles of the obtained ceramic powder presented nanometric size and SnO2 was the principal crystalline phase in them according to X-ray diffraction results. To determine the behavior of the synthesized samples in front of the thermal treatments, thermal analysis (DTA/TG) were made. Dilatometric studies on previously pressed samples were carried out. The optimal conditions of sintering of this raw material were determined. Microstructures and electric properties of sintered samples were studied using scanning electron microscopy (SEM) and I-V characteristics curves. The samples presented varistor behavior independent of the synthesis method used, with high nonlinearity values as 32. The presence of Al3+ favored the concentration of oxygen vacancies, and the grain growth.en
dc.description.affiliationGrupo CYTEMAC Departamento de Física Universidad del Cauca, Calle 5 4-70, Popayán - Cauca
dc.description.affiliationLIEC Universidad Estadual Paulista Instituto de Química, Araraquara
dc.description.affiliationUnespLIEC Universidad Estadual Paulista Instituto de Química, Araraquara
dc.format.extent372-378
dc.identifierhttp://dx.doi.org/10.3989/cyv.2006.v45.i6.264
dc.identifier.citationBoletin de la Sociedad Espanola de Ceramica y Vidrio, v. 45, n. 6, p. 372-378, 2006.
dc.identifier.doi10.3989/cyv.2006.v45.i6.264
dc.identifier.file2-s2.0-33750722468.pdf
dc.identifier.issn0366-3175
dc.identifier.scopus2-s2.0-33750722468
dc.identifier.urihttp://hdl.handle.net/11449/69214
dc.identifier.wosWOS:000241573300002
dc.language.isospa
dc.relation.ispartofBoletin de la Sociedad Espanola de Ceramica y Vidrio
dc.relation.ispartofjcr1.049
dc.relation.ispartofsjr0,264
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCoprecipitation
dc.subjectPechini
dc.subjectSnO2
dc.subjectSynthesis
dc.subjectVaristor
dc.titleMétodos químicos para obtener varistores basados en SnO2es
dc.title.alternativeChemical methods to obtain SnO2 based varistorsen
dc.typeArtigo
dcterms.licensehttp://ceramicayvidrio.revistas.csic.es/index.php/ceramicayvidrio/about/submissions#copyrightNotice
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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