Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system

Detalhes bibliográficos
Autor(a) principal: Dibb,Alessandro
Data de Publicação: 2006
Outros Autores: Cilense,Mario, Bueno,Paulo Roberto, Maniette,Yves, Varela,José Arana, Longo,Elson
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=S1516-14392006000300015
Resumo: The present paper aims to verify the inuence of rare earth oxide such as lanthanum (La2O3) and neodymium (Nd2O3) doping SnO2 + 0.25%CoO + 0.75%MnO2 + 0.05%Ta2O5 system. The analysis focus on microstructural inuence on electrical properties. Microstructural analysis were made by using Transmission Electron Microscopy (TEM) at different regions of the samples. From such analysis it was found that La2O3 and Nd2O3 oxides cause heterogeneous segregation and precipitation at grain boundary concerning cobalt and manganese, decreasing the nonohmic electrical properties, as discussed, likely due to the increasing of grain boundary non-active potential barriers.
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spelling Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor systemceramicvaristortin dioxiderare earth oxidesThe present paper aims to verify the inuence of rare earth oxide such as lanthanum (La2O3) and neodymium (Nd2O3) doping SnO2 + 0.25%CoO + 0.75%MnO2 + 0.05%Ta2O5 system. The analysis focus on microstructural inuence on electrical properties. Microstructural analysis were made by using Transmission Electron Microscopy (TEM) at different regions of the samples. From such analysis it was found that La2O3 and Nd2O3 oxides cause heterogeneous segregation and precipitation at grain boundary concerning cobalt and manganese, decreasing the nonohmic electrical properties, as discussed, likely due to the increasing of grain boundary non-active potential barriers.ABM, ABC, ABPol2006-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300015Materials Research v.9 n.3 2006reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392006000300015info:eu-repo/semantics/openAccessDibb,AlessandroCilense,MarioBueno,Paulo RobertoManiette,YvesVarela,José AranaLongo,Elsoneng2006-10-19T00:00:00Zoai:scielo:S1516-14392006000300015Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2006-10-19T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
title Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
spellingShingle Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
Dibb,Alessandro
ceramic
varistor
tin dioxide
rare earth oxides
title_short Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
title_full Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
title_fullStr Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
title_full_unstemmed Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
title_sort Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
author Dibb,Alessandro
author_facet Dibb,Alessandro
Cilense,Mario
Bueno,Paulo Roberto
Maniette,Yves
Varela,José Arana
Longo,Elson
author_role author
author2 Cilense,Mario
Bueno,Paulo Roberto
Maniette,Yves
Varela,José Arana
Longo,Elson
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Dibb,Alessandro
Cilense,Mario
Bueno,Paulo Roberto
Maniette,Yves
Varela,José Arana
Longo,Elson
dc.subject.por.fl_str_mv ceramic
varistor
tin dioxide
rare earth oxides
topic ceramic
varistor
tin dioxide
rare earth oxides
description The present paper aims to verify the inuence of rare earth oxide such as lanthanum (La2O3) and neodymium (Nd2O3) doping SnO2 + 0.25%CoO + 0.75%MnO2 + 0.05%Ta2O5 system. The analysis focus on microstructural inuence on electrical properties. Microstructural analysis were made by using Transmission Electron Microscopy (TEM) at different regions of the samples. From such analysis it was found that La2O3 and Nd2O3 oxides cause heterogeneous segregation and precipitation at grain boundary concerning cobalt and manganese, decreasing the nonohmic electrical properties, as discussed, likely due to the increasing of grain boundary non-active potential barriers.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-01
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=S1516-14392006000300015
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392006000300015
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.9 n.3 2006
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
_version_ 1754212658474647552

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