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Improvement in varistor properties of CaCu3Ti4O12 ceramics by chromium addition
dc.contributor.author | Grzebielucka, Edson | |
dc.contributor.author | Monteiro, Joao Frederico | |
dc.contributor.author | Souza, Eder | |
dc.contributor.author | Borges, Christiane Philippini Ferreira | |
dc.contributor.author | Chaves de Andrade, André Vitor | |
dc.contributor.author | Cordoncillo, Eloisa | |
dc.contributor.author | Beltrán Mir, Héctor | |
dc.contributor.author | Masetto Antunes, Sandra Regina | |
dc.date.accessioned | 2020-03-03T08:11:41Z | |
dc.date.available | 2020-03-03T08:11:41Z | |
dc.date.issued | 2019-11-17 | |
dc.identifier.citation | GRZEBIELUCKA, Edson Cezar, et al. Improvement in varistor properties of CaCu3Ti4O12 ceramics by chromium addition. Journal of Materials Science & Technology, 2020, 41: 12-20. | ca_CA |
dc.identifier.uri | http://hdl.handle.net/10234/186807 | |
dc.description.abstract | The effect of chromium addition on the structure and electrical properties of CaCu3Ti4O12 is studied. Compositions based on the formula CaCu3Ti4-xCrxO12-δ (x = 0, 0.025, 0.050 and 0.075 mol%) are prepared by solid-state reaction. Pellets sintered at 1070 °C for 12 h are characterised by X-ray diffraction, scanning electron microscopy/energy dispersive spectroscopy and impedance spectroscopy. Current density-electric field, dielectric loss and permittivity measurements are also carried out. Rietveld refinement showed the substitution of Cr(III) on the Ti(IV) site, with the maximum substitution for x = 0.025 mol%. The generation of electrical defects in the grain boundary region by chromium doping is responsible for increasing the electric breakdown field strength and nonlinearity coefficient at room temperature from 1723 V/cm and 5.29 for x = 0 mol% to 3431 V/cm and 8.16 for x = 0.025 mol%. This composition shows the greatest improvement in ceramic varistor parameters. | ca_CA |
dc.format.extent | 9 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Elsevier | ca_CA |
dc.rights | Copyright © 2020 Elsevier B.V. or its licensors or contributors. ScienceDirect ® is a registered trademark of Elsevier B.V. | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | CCTO | ca_CA |
dc.subject | impedance | ca_CA |
dc.subject | structural analysis | ca_CA |
dc.subject | varistor | ca_CA |
dc.subject | Rietveld | ca_CA |
dc.title | Improvement in varistor properties of CaCu3Ti4O12 ceramics by chromium addition | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | https://doi.org/10.1016/j.jmst.2019.08.055 | |
dc.relation.projectID | Ministerio de Economía y Competitividad (project MAT2016-80410-P) ; Universitat Jaume I (project No. UJIB-2016-38) | ca_CA |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | https://www.sciencedirect.com/science/article/pii/S1005030219304335 | ca_CA |
dc.date.embargoEndDate | 2021-11-17 | |
dc.contributor.funder | Complexo de Laboratórios Multiusuários (C-Labmu/UEPG) and CAPES, CNPq, Fundação Araucária | ca_CA |
dc.type.version | info:eu-repo/semantics/acceptedVersion | ca_CA |
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