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dc.creatorŽunić, Milan
dc.creatorBranković, Zorica
dc.creatorBranković, Goran
dc.creatorPoleti, Dejan
dc.date.accessioned2022-04-05T14:08:54Z
dc.date.available2022-04-05T14:08:54Z
dc.date.issued2006
dc.identifier.issn0255-5476
dc.identifier.urihttp://rimsi.imsi.bg.ac.rs/handle/123456789/161
dc.description.abstractThe effect of Co, Cr and Nb on the electrical properties of the grain boundaries of SnO2-based varistors was investigated. The powders were prepared by the method of evaporation and decomposition of solutions and suspensions. Varistor samples were obtained by uniaxial pressing followed by sintering at 1300 degrees C for 1h. The electrical properties of the grain-boundary region, such as resistance (R) and capacitance (C), were determined using ac impedance spectroscopy in the 27-330 degrees C temperature interval. Activation energies for conduction (E-A) were calculated from the Arrhenius equation. The non-linear coefficients (alpha) and the breakdown electric fields (E-b) of the samples were determined from the current-voltage characteristics. The potential barrier height (Phi(b)) was calculated using the Schottky-type conducting model. After a comparison of the characteristic parameters for different varistor compositions it was found that the Cr/Nb ratio has a crucial influence on the grain-boundary properties in SnO2 varistors.en
dc.publisherTrans Tech Publications Ltd
dc.rightsrestrictedAccess
dc.sourceMaterials Science Forum
dc.subjectvaristorsen
dc.subjectSnO2en
dc.subjectgrain boundaryen
dc.subjectelectrical propertiesen
dc.titleElectrical characterization of the grain-boundary region of SnO2 varistorsen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage240
dc.citation.other518: 235-240
dc.citation.rankM23
dc.citation.spage235
dc.citation.volume518
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_rimsi_161
dc.identifier.scopus2-s2.0-37849046866
dc.identifier.wos000239351800039
dc.type.versionpublishedVersion


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