Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ssi.2017.01.025 http://hdl.handle.net/11449/174170 |
Resumo: | The electrical conductivity of glasses with composition (mol%) 22Na2O·8CaO·65SiO2·5MO2 (M = Si, Ti, Ge, Zr, Sn, Ce) was evaluated by two different experimental methods: low-voltage ac impedance and high-voltage dc resistivity. The ac measurements were carried out by the traditional impedance spectroscopy between 90 and 415 °C. In the dc method, a steady-state electric field of about 1 MV/m was applied during 5 s at temperatures between 100 and 210 °C, and the onset current, Io, was measured. Activation energies between 0.71 and 0.81 eV were obtained. The differences between the values obtained by the dc and the ac methods are within experimental errors. The high electric field does not influence the concentration nor the mobility of the charge carriers for these experimental conditions and glass compositions. The dc method applied showed to be a suitable alternative to determine the temperature dependence of the electric conductivity of glasses to further calculation of the activation energy. |
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Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniquesActivation energydc conductivityImpedance spectroscopySilicate glassesThe electrical conductivity of glasses with composition (mol%) 22Na2O·8CaO·65SiO2·5MO2 (M = Si, Ti, Ge, Zr, Sn, Ce) was evaluated by two different experimental methods: low-voltage ac impedance and high-voltage dc resistivity. The ac measurements were carried out by the traditional impedance spectroscopy between 90 and 415 °C. In the dc method, a steady-state electric field of about 1 MV/m was applied during 5 s at temperatures between 100 and 210 °C, and the onset current, Io, was measured. Activation energies between 0.71 and 0.81 eV were obtained. The differences between the values obtained by the dc and the ac methods are within experimental errors. The high electric field does not influence the concentration nor the mobility of the charge carriers for these experimental conditions and glass compositions. The dc method applied showed to be a suitable alternative to determine the temperature dependence of the electric conductivity of glasses to further calculation of the activation energy.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Departamento de Física IGCE Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)Laboratório Nacional de Luz Síncrotron (LNLS)Departamento de Física Aplicada IFGW Universidade Estadual de Campinas (Unicamp)Departamento de Física IGCE Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)FAPESP: 2008/07238-4FAPESP: 2008/07304-7Universidade Estadual Paulista (Unesp)Laboratório Nacional de Luz Síncrotron (LNLS)Universidade Estadual de Campinas (UNICAMP)Ziemath, E. C. [UNESP]Escanhoela, C. A.Braunger, M. L.2018-12-11T17:09:41Z2018-12-11T17:09:41Z2017-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article146-151application/pdfhttp://dx.doi.org/10.1016/j.ssi.2017.01.025Solid State Ionics, v. 301, p. 146-151.0167-2738http://hdl.handle.net/11449/17417010.1016/j.ssi.2017.01.0252-s2.0-850116363292-s2.0-85011636329.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSolid State Ionics0,856info:eu-repo/semantics/openAccess2023-12-24T06:20:06Zoai:repositorio.unesp.br:11449/174170Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-24T06:20:06Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques |
title |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques |
spellingShingle |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques Ziemath, E. C. [UNESP] Activation energy dc conductivity Impedance spectroscopy Silicate glasses |
title_short |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques |
title_full |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques |
title_fullStr |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques |
title_full_unstemmed |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques |
title_sort |
Comparison of activation energies for the electrical conductivity of silicate glasses obtained by dc and ac techniques |
author |
Ziemath, E. C. [UNESP] |
author_facet |
Ziemath, E. C. [UNESP] Escanhoela, C. A. Braunger, M. L. |
author_role |
author |
author2 |
Escanhoela, C. A. Braunger, M. L. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Laboratório Nacional de Luz Síncrotron (LNLS) Universidade Estadual de Campinas (UNICAMP) |
dc.contributor.author.fl_str_mv |
Ziemath, E. C. [UNESP] Escanhoela, C. A. Braunger, M. L. |
dc.subject.por.fl_str_mv |
Activation energy dc conductivity Impedance spectroscopy Silicate glasses |
topic |
Activation energy dc conductivity Impedance spectroscopy Silicate glasses |
description |
The electrical conductivity of glasses with composition (mol%) 22Na2O·8CaO·65SiO2·5MO2 (M = Si, Ti, Ge, Zr, Sn, Ce) was evaluated by two different experimental methods: low-voltage ac impedance and high-voltage dc resistivity. The ac measurements were carried out by the traditional impedance spectroscopy between 90 and 415 °C. In the dc method, a steady-state electric field of about 1 MV/m was applied during 5 s at temperatures between 100 and 210 °C, and the onset current, Io, was measured. Activation energies between 0.71 and 0.81 eV were obtained. The differences between the values obtained by the dc and the ac methods are within experimental errors. The high electric field does not influence the concentration nor the mobility of the charge carriers for these experimental conditions and glass compositions. The dc method applied showed to be a suitable alternative to determine the temperature dependence of the electric conductivity of glasses to further calculation of the activation energy. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-03-01 2018-12-11T17:09:41Z 2018-12-11T17:09:41Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.ssi.2017.01.025 Solid State Ionics, v. 301, p. 146-151. 0167-2738 http://hdl.handle.net/11449/174170 10.1016/j.ssi.2017.01.025 2-s2.0-85011636329 2-s2.0-85011636329.pdf |
url |
http://dx.doi.org/10.1016/j.ssi.2017.01.025 http://hdl.handle.net/11449/174170 |
identifier_str_mv |
Solid State Ionics, v. 301, p. 146-151. 0167-2738 10.1016/j.ssi.2017.01.025 2-s2.0-85011636329 2-s2.0-85011636329.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Solid State Ionics 0,856 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
146-151 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797790097700028416 |