Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic

Detalhes bibliográficos
Autor(a) principal: Nobre,Marcos A. de Lima
Data de Publicação: 2003
Outros Autores: Lanfredi,Silvania
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000200007
Resumo: Impedance spectroscopy technique was used to investigate the electric properties of Zn7Sb2O12, an electroceramic with inverse spinel type structure. The electric characterization of the Zn7Sb2O12 semiconducting ceramic was performed at temperature from 250 to 550 °C, in the frequency range from 5 Hz to 13 MHz. Zinc antimoniate phase was synthesized by the polymeric precursors method. The bulk resistance curve as a function of temperature exhibits a thermistor behavior with negative temperature coefficient. The bulk conductivity follows the Arrhenius law with two linear branches of different slopes positioned at around a region of transition, 450 °C > T > 350 °C. The activation energy values at low temperature (< 350 °C) and high temperature (> 450 °C) are equals to 0.78 and 0.61 eV, respectively. The existence of a phase transition limiting these regions is discussed.
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spelling Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramicvaristorspinelsemiconductorimpedance spectroscopyImpedance spectroscopy technique was used to investigate the electric properties of Zn7Sb2O12, an electroceramic with inverse spinel type structure. The electric characterization of the Zn7Sb2O12 semiconducting ceramic was performed at temperature from 250 to 550 °C, in the frequency range from 5 Hz to 13 MHz. Zinc antimoniate phase was synthesized by the polymeric precursors method. The bulk resistance curve as a function of temperature exhibits a thermistor behavior with negative temperature coefficient. The bulk conductivity follows the Arrhenius law with two linear branches of different slopes positioned at around a region of transition, 450 °C > T > 350 °C. The activation energy values at low temperature (< 350 °C) and high temperature (> 450 °C) are equals to 0.78 and 0.61 eV, respectively. The existence of a phase transition limiting these regions is discussed.ABM, ABC, ABPol2003-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000200007Materials Research v.6 n.2 2003reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392003000200007info:eu-repo/semantics/openAccessNobre,Marcos A. de LimaLanfredi,Silvaniaeng2003-07-03T00:00:00Zoai:scielo:S1516-14392003000200007Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2003-07-03T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
title Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
spellingShingle Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
Nobre,Marcos A. de Lima
varistor
spinel
semiconductor
impedance spectroscopy
title_short Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
title_full Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
title_fullStr Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
title_full_unstemmed Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
title_sort Electrical characterization by impedance spectroscopy of Zn7Sb2O12 ceramic
author Nobre,Marcos A. de Lima
author_facet Nobre,Marcos A. de Lima
Lanfredi,Silvania
author_role author
author2 Lanfredi,Silvania
author2_role author
dc.contributor.author.fl_str_mv Nobre,Marcos A. de Lima
Lanfredi,Silvania
dc.subject.por.fl_str_mv varistor
spinel
semiconductor
impedance spectroscopy
topic varistor
spinel
semiconductor
impedance spectroscopy
description Impedance spectroscopy technique was used to investigate the electric properties of Zn7Sb2O12, an electroceramic with inverse spinel type structure. The electric characterization of the Zn7Sb2O12 semiconducting ceramic was performed at temperature from 250 to 550 °C, in the frequency range from 5 Hz to 13 MHz. Zinc antimoniate phase was synthesized by the polymeric precursors method. The bulk resistance curve as a function of temperature exhibits a thermistor behavior with negative temperature coefficient. The bulk conductivity follows the Arrhenius law with two linear branches of different slopes positioned at around a region of transition, 450 °C > T > 350 °C. The activation energy values at low temperature (< 350 °C) and high temperature (> 450 °C) are equals to 0.78 and 0.61 eV, respectively. The existence of a phase transition limiting these regions is discussed.
publishDate 2003
dc.date.none.fl_str_mv 2003-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000200007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000200007
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392003000200007
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.6 n.2 2003
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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