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DC Field | Value | Language |
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dc.contributor.author | Ramirez, Miguel Angel | - |
dc.contributor.author | Bassi, Welson | - |
dc.contributor.author | Parra, Rodrigo | - |
dc.contributor.author | Bueno, Paulo Roberto | - |
dc.contributor.author | Longo, Elson | - |
dc.contributor.author | Varela, José Arana | - |
dc.date.accessioned | 2014-05-20T14:18:32Z | - |
dc.date.accessioned | 2016-10-25T17:40:35Z | - |
dc.date.available | 2014-05-20T14:18:32Z | - |
dc.date.available | 2016-10-25T17:40:35Z | - |
dc.date.issued | 2008-07-01 | - |
dc.identifier | http://dx.doi.org/10.1111/j.1551-2916.2008.02436.x | - |
dc.identifier.citation | Journal of The American Ceramic Society. Malden: Wiley-blackwell, v. 91, n. 7, p. 2402-2404, 2008. | - |
dc.identifier.issn | 0002-7820 | - |
dc.identifier.uri | http://hdl.handle.net/11449/25586 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/25586 | - |
dc.description.abstract | The complete I-V characteristics of SnO(2)-based varistors, particularly of the Pianaro system SCNCr consisting in 98.9%SnO(2)+1%CoO+0.05%Nb(2)O(5)+0.05%Cr(2)O(3), all in mol%, have been seldom reported in the literature. A comparative study at low and high currents of the nonohmic behavior of SCNCr- and ZnO-based varistors (modified Matsuoka system) is proposed in this work. The SCNCr system showed higher nonlinearity coefficients in the whole range of measured current. The electrical breakdown field (E(b)) was twice as high for the SCNCr system (5400 V/cm) than for the ZnO varistor (2600 V/cm) due to a smaller average grain size of the former (4.5 mu m) with respect to the latter (8.5 mu m). Nevertheless, we consider that another important factor responsible for the high E(b) in the SCNCr system is the great number of electrically active interfaces (85%) as determined with electrostatic force microscopy (EFM). It was also established that the SCNCr system might be produced in disks of smaller dimensions than that of commercial ZnO-based product, with a 5.0 cm(-1) minimal area-volume (A/V) ratio. The SCNCr reached the saturation current in a short time because of the high resistivity of the grains, which is five times higher than that of the grains in ZnO-based varistors. | en |
dc.format.extent | 2402-2404 | - |
dc.language.iso | eng | - |
dc.publisher | Wiley-Blackwell | - |
dc.source | Web of Science | - |
dc.title | Comparative electrical behavior at low and high current of SnO(2)- and ZnO-based varistors | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Universidade de São Paulo (USP) | - |
dc.contributor.institution | UNMdP CONILET | - |
dc.description.affiliation | Univ Estadual Paulista, Inst Quim, Dept Quim Fis, BR-14800900 Araraquara, SP, Brazil | - |
dc.description.affiliation | Univ São Paulo, Inst Eletrotecn & Energia, BR-05508010 São Paulo, Brazil | - |
dc.description.affiliation | UNMdP CONILET, INTEMA, Mar Del Plata, Buenos Aires, Argentina | - |
dc.description.affiliationUnesp | Univ Estadual Paulista, Inst Quim, Dept Quim Fis, BR-14800900 Araraquara, SP, Brazil | - |
dc.identifier.doi | 10.1111/j.1551-2916.2008.02436.x | - |
dc.identifier.wos | WOS:000257709100056 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Journal of the American Ceramic Society | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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