Effect of Fe2O3 doping on the electrical properties of a SnO2 based varistor

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dc.contributor.authorAntunes, A. C.
dc.contributor.authorAntunes, SRM
dc.contributor.authorZara, A. J.
dc.contributor.authorPianaro, S. A.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.institutionUniv Estadual Ponta Grossa
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:24:11Z
dc.date.available2014-05-20T15:24:11Z
dc.date.issued2002-06-15
dc.description.abstractThe effect of Fe2O3 addition on the densification and electrical properties of the (0.9895 - x) SnO2 + 0.01CoO + 0.005Nb(2)O(5) + xFe(2)O(3) system, where x = 0.005 or 0.01, was considered in this study. The samples were sintered at 1300degreesC for 2 h. Microstructure analysis by scanning electron microscopy showed that the effect of Fe2O3 addition is to decrease the SnO2 grain size. J x E curves indicated that the system exhibit a varistor behavior and the effect of Fe2O3 is to increase both, the non-linear coefficient (alpha) and the breakdown voltage (E-r). Considering the Schottky thermionic emission model the potential height and width were estimated. Small amount addition of Fe2O3 to the basic system increases both the potential barrier height and width. (C) 2002 Kluwer Academic Publishers.en
dc.description.affiliationUniv Estadual Ponta Grossa, LIMAC, Ctr Interdisciplinar Pesquisa & Pos Grad, BR-84031510 Ponta Grossa, PR, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent2407-2411
dc.identifierhttp://dx.doi.org/10.1023/A:1015458700086
dc.identifier.citationJournal of Materials Science. New York: Springer, v. 37, n. 12, p. 2407-2411, 2002.
dc.identifier.doi10.1023/A:1015458700086
dc.identifier.issn0022-2461
dc.identifier.urihttp://hdl.handle.net/11449/34827
dc.identifier.wosWOS:000175570100002
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Materials Science
dc.relation.ispartofjcr2.993
dc.relation.ispartofsjr0,807
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleEffect of Fe2O3 doping on the electrical properties of a SnO2 based varistoren
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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