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

Detalhes bibliográficos
Autor(a) principal: Dibb, Alessandro [UNESP]
Data de Publicação: 2006
Outros Autores: Cilense, Mario [UNESP], Bueno, Paulo Roberto [UNESP], Maniette, Yves [UNESP], Varela, José Arana [UNESP], Longo, Elson [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S1516-14392006000300015
http://hdl.handle.net/11449/30580
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.
id UNSP_3be34041388522208800517f93fae37c
oai_identifier_str oai:repositorio.unesp.br:11449/30580
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista Instituto de Química Departamento de Físico-QuímicaUniversidade Estadual Paulista Instituto de Química Departamento de Físico-QuímicaABM, ABC, ABPolUniversidade Estadual Paulista (Unesp)Dibb, Alessandro [UNESP]Cilense, Mario [UNESP]Bueno, Paulo Roberto [UNESP]Maniette, Yves [UNESP]Varela, José Arana [UNESP]Longo, Elson [UNESP]2014-05-20T15:17:43Z2014-05-20T15:17:43Z2006-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article339-343application/pdfhttp://dx.doi.org/10.1590/S1516-14392006000300015Materials Research. ABM, ABC, ABPol, v. 9, n. 3, p. 339-343, 2006.1516-1439http://hdl.handle.net/11449/3058010.1590/S1516-14392006000300015S1516-143920060003000152-s2.0-33750520971S1516-14392006000300015.pdf912835310308339404770459067332540000-0003-2827-0208SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Research1.1030,398info:eu-repo/semantics/openAccess2023-11-21T06:09:18Zoai:repositorio.unesp.br:11449/30580Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:17:34.396467Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)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 [UNESP]
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 [UNESP]
author_facet Dibb, Alessandro [UNESP]
Cilense, Mario [UNESP]
Bueno, Paulo Roberto [UNESP]
Maniette, Yves [UNESP]
Varela, José Arana [UNESP]
Longo, Elson [UNESP]
author_role author
author2 Cilense, Mario [UNESP]
Bueno, Paulo Roberto [UNESP]
Maniette, Yves [UNESP]
Varela, José Arana [UNESP]
Longo, Elson [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Dibb, Alessandro [UNESP]
Cilense, Mario [UNESP]
Bueno, Paulo Roberto [UNESP]
Maniette, Yves [UNESP]
Varela, José Arana [UNESP]
Longo, Elson [UNESP]
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
2014-05-20T15:17:43Z
2014-05-20T15:17:43Z
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/10.1590/S1516-14392006000300015
Materials Research. ABM, ABC, ABPol, v. 9, n. 3, p. 339-343, 2006.
1516-1439
http://hdl.handle.net/11449/30580
10.1590/S1516-14392006000300015
S1516-14392006000300015
2-s2.0-33750520971
S1516-14392006000300015.pdf
9128353103083394
0477045906733254
0000-0003-2827-0208
url http://dx.doi.org/10.1590/S1516-14392006000300015
http://hdl.handle.net/11449/30580
identifier_str_mv Materials Research. ABM, ABC, ABPol, v. 9, n. 3, p. 339-343, 2006.
1516-1439
10.1590/S1516-14392006000300015
S1516-14392006000300015
2-s2.0-33750520971
S1516-14392006000300015.pdf
9128353103083394
0477045906733254
0000-0003-2827-0208
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Materials Research
1.103
0,398
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 339-343
application/pdf
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv SciELO
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_ 1808128917601517568

Registros relacionados