The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors

Variations on the microstructure development and on the electrical properties of SnO2-based varistors are discussed on the basis of the oxygen vacancies created or annihilated by the presence of different additives. Electron paramagnetic resonance (EPR) analysis of sintered samples evidenced a subst...

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Detalles Bibliográficos
Autores: Parra, Rodrigo, Aldao, Celso Manuel, Varela, J. A., Castro, Miriam Susana
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2004
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/29543
Acceso en línea:http://hdl.handle.net/11336/29543
Access Level:acceso abierto
Palabra clave:Defects
Electrical Properties
Microsdtructure
Varistors
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
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spelling The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistorsParra, RodrigoAldao, Celso ManuelVarela, J. A.Castro, Miriam SusanaDefectsElectrical PropertiesMicrosdtructureVaristorshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Variations on the microstructure development and on the electrical properties of SnO2-based varistors are discussed on the basis of the oxygen vacancies created or annihilated by the presence of different additives. Electron paramagnetic resonance (EPR) analysis of sintered samples evidenced a substantial increase in the paramagnetic oxygen vacancies concentration when Nb2O5 is added to the SnO2 · Co3O4 system. On the other hand, the observed diminution in the concentration of such species after the addition of Fe2O3 indicates solid solution formation. The quantification of paramagnetic oxygen vacancies allowed to confirm the proposed substitutions taking place in the lattice during sintering. These findings are supported by scanning electron microscopy, by density measurements and by current density versus electric field curves. The characterization of secondary phases through EDS assisted SEM and TEM is also reported in this work.Fil: Parra, Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Aldao, Celso Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Varela, J. A.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Castro, Miriam Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaSpringer2004-07-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/29543Parra, Rodrigo; Aldao, Celso Manuel; Varela, J. A.; Castro, Miriam Susana; The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors; Springer; Journal Of Electroceramics; 14; 2; 31-7-2004; 149-1561385-34491573-8663CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10832-005-0879-1info:eu-repo/semantics/altIdentifier/doi/10.1007/s10832-005-0879-1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:27:53Zoai:ri.conicet.gov.ar:11336/29543instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 14:27:53.78CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
title The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
spellingShingle The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
Parra, Rodrigo
Defects
Electrical Properties
Microsdtructure
Varistors
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
title_short The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
title_full The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
title_fullStr The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
title_full_unstemmed The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
title_sort The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
dc.creator.none.fl_str_mv Parra, Rodrigo
Aldao, Celso Manuel
Varela, J. A.
Castro, Miriam Susana
author Parra, Rodrigo
author_facet Parra, Rodrigo
Aldao, Celso Manuel
Varela, J. A.
Castro, Miriam Susana
author_role author
author2 Aldao, Celso Manuel
Varela, J. A.
Castro, Miriam Susana
author2_role author
author
author
dc.subject.none.fl_str_mv Defects
Electrical Properties
Microsdtructure
Varistors
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
topic Defects
Electrical Properties
Microsdtructure
Varistors
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
description Variations on the microstructure development and on the electrical properties of SnO2-based varistors are discussed on the basis of the oxygen vacancies created or annihilated by the presence of different additives. Electron paramagnetic resonance (EPR) analysis of sintered samples evidenced a substantial increase in the paramagnetic oxygen vacancies concentration when Nb2O5 is added to the SnO2 · Co3O4 system. On the other hand, the observed diminution in the concentration of such species after the addition of Fe2O3 indicates solid solution formation. The quantification of paramagnetic oxygen vacancies allowed to confirm the proposed substitutions taking place in the lattice during sintering. These findings are supported by scanning electron microscopy, by density measurements and by current density versus electric field curves. The characterization of secondary phases through EDS assisted SEM and TEM is also reported in this work.
publishDate 2004
dc.date.none.fl_str_mv 2004-07-31
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/29543
Parra, Rodrigo; Aldao, Celso Manuel; Varela, J. A.; Castro, Miriam Susana; The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors; Springer; Journal Of Electroceramics; 14; 2; 31-7-2004; 149-156
1385-3449
1573-8663
CONICET Digital
CONICET
url http://hdl.handle.net/11336/29543
identifier_str_mv Parra, Rodrigo; Aldao, Celso Manuel; Varela, J. A.; Castro, Miriam Susana; The role of the oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors; Springer; Journal Of Electroceramics; 14; 2; 31-7-2004; 149-156
1385-3449
1573-8663
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10832-005-0879-1
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10832-005-0879-1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15.812429

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