MnO2 influence on the electrical properties of SnO2-based ceramic systems

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dc.contributor.authorDibb, Alessandro [UNESP]
dc.contributor.authorTebcherani, Sérgio M. [UNESP]
dc.contributor.authorSantos, Maria Rita de C.
dc.contributor.authorCilense, Mário [UNESP]
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2014-05-27T11:20:13Z
dc.date.available2014-05-27T11:20:13Z
dc.date.issued2001-01-01
dc.description.abstractTin dioxide is an n-type semiconductor that when doped with other metallic oxides exhibits non-linear electric behavior with high non-linear coefficient values typical of a varistor. In this work, electrical properties of the SnO2.CoO.Ta2O5 and SnO2.CoO.MnO2.Ta2O5 ceramics systems were studied with the objective of analyzing the influence of MnO2 on sintering behavior and electrical properties of these systems. The compacts were prepared by powder mixture process and sintered at 1300°C for 1 hour, in air, using a constant heating rate of 10°C/min. The morphological and structural properties were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The densities of the sintered ceramics were measured using the Archimedes method. The SnO2.CoO.Ta2O5 and SnO2.CoO.MnO2.Ta2O5 systems presented breakdown fields (Eb) about 3100 V.cm-1 and 3800 V.cm-1, respectively, and non-linear coefficient (α) about 10 and 20, respectively.en
dc.description.affiliationDepto. de Fisico-Quimica UNESP Instituto de Química, C.P.355, CEP 14801-970 Araraquara SP
dc.description.affiliationDepartamento de Química UFSCar, C.P. 676, CEP 13565-905 São Carlos SP
dc.description.affiliationUnespDepto. de Fisico-Quimica UNESP Instituto de Química, C.P.355, CEP 14801-970 Araraquara SP
dc.format.extent161-165
dc.identifierhttp://dx.doi.org/10.4028/www.scientific.net/KEM.189-191.161
dc.identifier.citationKey Engineering Materials, v. 189-191, p. 161-165, 2001.
dc.identifier.doi10.4028/www.scientific.net/KEM.189-191.161
dc.identifier.issn1013-9826
dc.identifier.lattes9128353103083394
dc.identifier.scopus2-s2.0-0035151590
dc.identifier.urihttp://hdl.handle.net/11449/66435
dc.identifier.wosWOS:000168303300027
dc.language.isoeng
dc.relation.ispartofKey Engineering Materials
dc.relation.ispartofsjr0,180
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectAlcohols
dc.subjectBall milling
dc.subjectElectric properties
dc.subjectManganese compounds
dc.subjectMicrostructure
dc.subjectMorphology
dc.subjectPowders
dc.subjectScanning electron microscopy
dc.subjectSemiconducting tin compounds
dc.subjectSintering
dc.subjectVaristors
dc.subjectX ray diffraction
dc.subjectArchimedes method
dc.subjectDense ceramics
dc.subjectManganese dioxide
dc.subjectTin dioxide
dc.subjectCeramic materials
dc.titleMnO2 influence on the electrical properties of SnO2-based ceramic systemsen
dc.typeArtigo
dcterms.licensehttp://www.ttp.net/Downloads.html
unesp.author.lattes9128353103083394
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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