Electrical and microstructural properties of microwave sintered SnO2-based varistors

Detalhes bibliográficos
Autor(a) principal: Furtado,P. S.
Data de Publicação: 2012
Outros Autores: Oliveira,M. M., Vasconcelos,J. S., Rangel,J. H. G., Longo,E., Sousa,V. C de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132012000200004
Resumo: An investigation was made of the microstructural and electrical properties of SnO2-based varistors microwave sintered at 1200 ºC, applying a heating rate of 120 ºC/min and treatment times of 10, 20, 30, 40, 50 and 60 min. The system used in this study was (98.95-X) %SnO2.1.0%CoO.0.05%Cr2O3.X%Ta2O5, where X corresponds to 0.05 and 0.065 mol%. Sintering was carried out in a domestic microwave oven (2.45 GHz) fitted for lab use. Silicon carbide was placed in a refractory vessel to form a heating chamber surrounding the sample holder. The pellets were examined by scanning electron microscopy, X-ray diffractometry, direct current measurements and impedance spectroscopy. The parameters of density, medium grain size, coefficient of nonlinearity, breakdown electrical field, leakage current, and height and width of the potential barrier were analyzed.
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spelling Electrical and microstructural properties of microwave sintered SnO2-based varistorsmicrowave sinteringelectrical propertiesSnO2varistorsAn investigation was made of the microstructural and electrical properties of SnO2-based varistors microwave sintered at 1200 ºC, applying a heating rate of 120 ºC/min and treatment times of 10, 20, 30, 40, 50 and 60 min. The system used in this study was (98.95-X) %SnO2.1.0%CoO.0.05%Cr2O3.X%Ta2O5, where X corresponds to 0.05 and 0.065 mol%. Sintering was carried out in a domestic microwave oven (2.45 GHz) fitted for lab use. Silicon carbide was placed in a refractory vessel to form a heating chamber surrounding the sample holder. The pellets were examined by scanning electron microscopy, X-ray diffractometry, direct current measurements and impedance spectroscopy. The parameters of density, medium grain size, coefficient of nonlinearity, breakdown electrical field, leakage current, and height and width of the potential barrier were analyzed.Associação Brasileira de Cerâmica2012-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132012000200004Cerâmica v.58 n.346 2012reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69132012000200004info:eu-repo/semantics/openAccessFurtado,P. S.Oliveira,M. M.Vasconcelos,J. S.Rangel,J. H. G.Longo,E.Sousa,V. C deeng2012-07-24T00:00:00Zoai:scielo:S0366-69132012000200004Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2012-07-24T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Electrical and microstructural properties of microwave sintered SnO2-based varistors
title Electrical and microstructural properties of microwave sintered SnO2-based varistors
spellingShingle Electrical and microstructural properties of microwave sintered SnO2-based varistors
Furtado,P. S.
microwave sintering
electrical properties
SnO2
varistors
title_short Electrical and microstructural properties of microwave sintered SnO2-based varistors
title_full Electrical and microstructural properties of microwave sintered SnO2-based varistors
title_fullStr Electrical and microstructural properties of microwave sintered SnO2-based varistors
title_full_unstemmed Electrical and microstructural properties of microwave sintered SnO2-based varistors
title_sort Electrical and microstructural properties of microwave sintered SnO2-based varistors
author Furtado,P. S.
author_facet Furtado,P. S.
Oliveira,M. M.
Vasconcelos,J. S.
Rangel,J. H. G.
Longo,E.
Sousa,V. C de
author_role author
author2 Oliveira,M. M.
Vasconcelos,J. S.
Rangel,J. H. G.
Longo,E.
Sousa,V. C de
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Furtado,P. S.
Oliveira,M. M.
Vasconcelos,J. S.
Rangel,J. H. G.
Longo,E.
Sousa,V. C de
dc.subject.por.fl_str_mv microwave sintering
electrical properties
SnO2
varistors
topic microwave sintering
electrical properties
SnO2
varistors
description An investigation was made of the microstructural and electrical properties of SnO2-based varistors microwave sintered at 1200 ºC, applying a heating rate of 120 ºC/min and treatment times of 10, 20, 30, 40, 50 and 60 min. The system used in this study was (98.95-X) %SnO2.1.0%CoO.0.05%Cr2O3.X%Ta2O5, where X corresponds to 0.05 and 0.065 mol%. Sintering was carried out in a domestic microwave oven (2.45 GHz) fitted for lab use. Silicon carbide was placed in a refractory vessel to form a heating chamber surrounding the sample holder. The pellets were examined by scanning electron microscopy, X-ray diffractometry, direct current measurements and impedance spectroscopy. The parameters of density, medium grain size, coefficient of nonlinearity, breakdown electrical field, leakage current, and height and width of the potential barrier were analyzed.
publishDate 2012
dc.date.none.fl_str_mv 2012-06-01
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=S0366-69132012000200004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132012000200004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0366-69132012000200004
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 Associação Brasileira de Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.58 n.346 2012
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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