A new interpretation for the degradation phenomenon of ZnO varistors

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.creatorLeite, E. R.-
Autor(es): dc.creatorVarela, J. A.-
Autor(es): dc.creatorLongo, E.-
Data de aceite: dc.date.accessioned2025-08-21T17:20:11Z-
Data de disponibilização: dc.date.available2025-08-21T17:20:11Z-
Data de envio: dc.date.issued2022-04-30-
Data de envio: dc.date.issued2022-04-30-
Data de envio: dc.date.issued1992-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/BF02403838-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/232741-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/232741-
Descrição: dc.descriptionThe electrical degradation phenomena of zinc oxide-based varistors were studied using a high-energy current pulse and a.c. polarization at different temperatures. Activation energy measurements during the degradation process showed that these phenomena are associated with diffusion and that the diffusion-controlling species are slower than Zn., For degradation promoted by current pulses of 8×20 μs, the Schottky potential barrier deformation was measured. A decrease in height and width of the potential barrier due to the reduction of surface states density, Ns, without a significant change in donor density, Nd, was observed. To explain these results, a modification of the unstable components model is proposed for the potential barrier in which the degradation is due to oxi-reduction reactions between atomic defects. These reactions promote the elimination of zinc vacancies and/or adsorbed oxygen on the grain boundaries. © 1992 Chapman & Hall.-
Descrição: dc.descriptionDepartamento Prod. Elétricos, 3M do Brasil, Via Anhanguera, Km 110, Campinas, SP-
Descrição: dc.descriptionInstituto de Química UNESP, CP 355, Araraquara, SP, 14800-
Descrição: dc.descriptionDepartamento de Química UFSCar, CP 676, São Carlos, SP, 13560-
Descrição: dc.descriptionInstituto de Química UNESP, CP 355, Araraquara, SP, 14800-
Formato: dc.format5325-5329-
Idioma: dc.languageen-
Relação: dc.relationJournal of Materials Science-
???dc.source???: dc.sourceScopus-
Título: dc.titleA new interpretation for the degradation phenomenon of ZnO varistors-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.