Activation energy of polarization due to electrical conductivity and dipole rotation in purified ca-bentonite

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dc.contributor.authorKucukcelebi, Hayreddin
dc.contributor.authorDurmus, Haziret
dc.contributor.authorDeryal, Abdullah
dc.contributor.authorTaser, Mehmet
dc.contributor.authorKarakaya, Necati
dc.date.accessioned2020-03-26T18:23:42Z
dc.date.available2020-03-26T18:23:42Z
dc.date.issued2012
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractWe determined the activation energy for dipole rotation and electrical conductivity by analyzing the frequency dependent dielectric permittivity measurements of purified Ca-Bentonite. The measurements were performed at four different temperatures between 296 K and 353 K and at frequencies between 5 Hz to 5 MHz. We used the Havriliak-Negami (HN) relation to represent the polarization due to dipole orientations and the Maxwell-Wagner-Sillars (MWS) relation with a power law term to represent the interfacial polarization. We obtained expressions for the real and imaginary parts of electric modulus M*(omega). We determined the relaxation times for HN and MWS contributions from a fit of the experimental data. Subsequently, the activation energies for HN and MWS contributions were obtained from an Arrhenius plot. The activation energy for the HN and MWS processes were found to be 22.3 kJ/mot and 18.2 kJ/mol, respectively. (C) 2012 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.clay.2012.04.007en_US
dc.identifier.endpage79en_US
dc.identifier.issn0169-1317en_US
dc.identifier.issn1872-9053en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage70en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.clay.2012.04.007
dc.identifier.urihttps://hdl.handle.net/20.500.12395/27708
dc.identifier.volume62-63en_US
dc.identifier.wosWOS:000306031600011en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherELSEVIERen_US
dc.relation.ispartofAPPLIED CLAY SCIENCEen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectCa-bentoniteen_US
dc.subjectDielectric relaxationen_US
dc.subjectOrientational polarizationen_US
dc.subjectInterfacial polarizationen_US
dc.subjectElectric modulusen_US
dc.subjectActivation energyen_US
dc.titleActivation energy of polarization due to electrical conductivity and dipole rotation in purified ca-bentoniteen_US
dc.typeArticleen_US

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