You are in the accessibility menu

Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorLeite, E. R.-
dc.contributor.authorNobre, Marcos Augusto Lima-
dc.contributor.authorLongo, Elson-
dc.contributor.authorVarela, José Arana-
dc.identifier.citationJournal of Materials Science, v. 31, n. 20, p. 5391-5398, 1996.-
dc.description.abstractThe microstructural evolution, grain growth and densification for the varistor systems ZnO-Bi2O3 (ZB), ZnO-Bi2O3-Sb2O3 (ZBS), ZnO-Bi2O3-Sb2O3-MnO-Cr 2O3-CoO (ZBSCCM) were studied using constant heating rate sintering, scanning electron microscopy (SEM) and in situ phase formation measurement by high temperature X-ray diffraction (HT-XRD). The results showed that the densifying process is controlled by the formation and decomposition of the Zn2Bi3Sb3O14 pyrochlore (PY) phase for the ZBS and ZBSCCM systems. The addition of transition metals (ZBSCCM system) alters the formation and decomposition reaction temperatures of the pyrochlore phase and the morphology of the Zn7Sb2O12 spinel phase. Thus, the spinel grains act as inclusions and decrease the ZnO grain growth rate. Spinel grain growth kinetics in the ZBSCCM system showed an n value of 2.6, and SEM and HT-XRD results indicate two grain growth mechanisms based on coalescence and Ostwald ripening. © 1996 Chapman & Hall.en
dc.subjectCeramic materials-
dc.subjectGrain growth-
dc.subjectScanning electron microscopy-
dc.subjectTransition metal compounds-
dc.subjectMicrostructural evolution-
dc.subjectPyrochlore phases-
dc.subjectZnO-based semiconducting ceramics-
dc.subjectSemiconducting zinc compounds-
dc.titleMicrostructural development of ZnO varistor during reactive liquid phase sinteringen
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationDepartamento de Química Universidade Federal de São Carlos, Caixa Postal 676, 13565-905 São Carlos, SP-
dc.description.affiliationInstituto de Química Universidade Estadual Paulista, Caixa Postal 355, 14800-900 Araraquara, SP-
dc.description.affiliationUnespInstituto de Química Universidade Estadual Paulista, Caixa Postal 355, 14800-900 Araraquara, SP-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Materials Science-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.