High-performance and low-voltage SnO2-based varistors
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ceramint.2017.07.089 http://hdl.handle.net/11449/169926 |
Resumo: | This paper presents the results of a thorough study conducted on the action mechanism of one-dimensional single-crystalline SnO2 nanobelts in decreasing the breakdown electric field (Eb) in SnO2-based varistors. The proposed method has general validity in that our investigation was focused on the traditional varistor composition SnO2-CoO-Cr2O3-Nb2O5. To accomplish our study objective, two methods of decreasing Eb value were compared; one involving the increase in average grain size of the varistor through the sintering time and the other one related to the addition of nanobelts. The morphological results show that the method involving the increase in average grain size is limited by the formation of intragranular pores. Furthermore, despite contributing successfully towards decreasing the Eb value (which underwent a decline from 3990 V cm−1 to 1133 V cm−1 with an increase in sintering time from 1 h to 2 h), the reduction obtained by this method is found to be much lower compared to that obtained via the nanobelts insertion method (Eb = 270 V cm−1). Impedance spectroscopy results showed that the insertion of nanobelts caused a decline in the grain boundary resistance while surface potential measurements proved that this decline in resistance is attributed to the absence of potential barriers along the belts which leads to the formation of a lower resistance percolation path in the varistor. |
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High-performance and low-voltage SnO2-based varistorsB. NanostructureC. Electrical propertiesD. SnO2E. VaristorThis paper presents the results of a thorough study conducted on the action mechanism of one-dimensional single-crystalline SnO2 nanobelts in decreasing the breakdown electric field (Eb) in SnO2-based varistors. The proposed method has general validity in that our investigation was focused on the traditional varistor composition SnO2-CoO-Cr2O3-Nb2O5. To accomplish our study objective, two methods of decreasing Eb value were compared; one involving the increase in average grain size of the varistor through the sintering time and the other one related to the addition of nanobelts. The morphological results show that the method involving the increase in average grain size is limited by the formation of intragranular pores. Furthermore, despite contributing successfully towards decreasing the Eb value (which underwent a decline from 3990 V cm−1 to 1133 V cm−1 with an increase in sintering time from 1 h to 2 h), the reduction obtained by this method is found to be much lower compared to that obtained via the nanobelts insertion method (Eb = 270 V cm−1). Impedance spectroscopy results showed that the insertion of nanobelts caused a decline in the grain boundary resistance while surface potential measurements proved that this decline in resistance is attributed to the absence of potential barriers along the belts which leads to the formation of a lower resistance percolation path in the varistor.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)São Paulo State University (UNESP) Physical-Chemistry DepartmentSão Paulo State University (UNESP) Physical-Chemistry DepartmentFAPESP: #2013/07296-2FAPESP: #2015/21033-0CNPq: #303542/2015-2CNPq: #447760/2014-9CNPq: #800733/2014-2Universidade Estadual Paulista (Unesp)Masteghin, Mateus G. [UNESP]Bertinotti, Rafael C. [UNESP]Orlandi, Marcelo O. [UNESP]2018-12-11T16:48:14Z2018-12-11T16:48:14Z2017-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article13759-13764application/pdfhttp://dx.doi.org/10.1016/j.ceramint.2017.07.089Ceramics International, v. 43, n. 16, p. 13759-13764, 2017.0272-8842http://hdl.handle.net/11449/16992610.1016/j.ceramint.2017.07.0892-s2.0-850237469912-s2.0-85023746991.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramics International0,784info:eu-repo/semantics/openAccess2023-10-14T06:05:19Zoai:repositorio.unesp.br:11449/169926Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-14T06:05:19Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
High-performance and low-voltage SnO2-based varistors |
title |
High-performance and low-voltage SnO2-based varistors |
spellingShingle |
High-performance and low-voltage SnO2-based varistors Masteghin, Mateus G. [UNESP] B. Nanostructure C. Electrical properties D. SnO2 E. Varistor |
title_short |
High-performance and low-voltage SnO2-based varistors |
title_full |
High-performance and low-voltage SnO2-based varistors |
title_fullStr |
High-performance and low-voltage SnO2-based varistors |
title_full_unstemmed |
High-performance and low-voltage SnO2-based varistors |
title_sort |
High-performance and low-voltage SnO2-based varistors |
author |
Masteghin, Mateus G. [UNESP] |
author_facet |
Masteghin, Mateus G. [UNESP] Bertinotti, Rafael C. [UNESP] Orlandi, Marcelo O. [UNESP] |
author_role |
author |
author2 |
Bertinotti, Rafael C. [UNESP] Orlandi, Marcelo O. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Masteghin, Mateus G. [UNESP] Bertinotti, Rafael C. [UNESP] Orlandi, Marcelo O. [UNESP] |
dc.subject.por.fl_str_mv |
B. Nanostructure C. Electrical properties D. SnO2 E. Varistor |
topic |
B. Nanostructure C. Electrical properties D. SnO2 E. Varistor |
description |
This paper presents the results of a thorough study conducted on the action mechanism of one-dimensional single-crystalline SnO2 nanobelts in decreasing the breakdown electric field (Eb) in SnO2-based varistors. The proposed method has general validity in that our investigation was focused on the traditional varistor composition SnO2-CoO-Cr2O3-Nb2O5. To accomplish our study objective, two methods of decreasing Eb value were compared; one involving the increase in average grain size of the varistor through the sintering time and the other one related to the addition of nanobelts. The morphological results show that the method involving the increase in average grain size is limited by the formation of intragranular pores. Furthermore, despite contributing successfully towards decreasing the Eb value (which underwent a decline from 3990 V cm−1 to 1133 V cm−1 with an increase in sintering time from 1 h to 2 h), the reduction obtained by this method is found to be much lower compared to that obtained via the nanobelts insertion method (Eb = 270 V cm−1). Impedance spectroscopy results showed that the insertion of nanobelts caused a decline in the grain boundary resistance while surface potential measurements proved that this decline in resistance is attributed to the absence of potential barriers along the belts which leads to the formation of a lower resistance percolation path in the varistor. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-11-01 2018-12-11T16:48:14Z 2018-12-11T16:48:14Z |
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/10.1016/j.ceramint.2017.07.089 Ceramics International, v. 43, n. 16, p. 13759-13764, 2017. 0272-8842 http://hdl.handle.net/11449/169926 10.1016/j.ceramint.2017.07.089 2-s2.0-85023746991 2-s2.0-85023746991.pdf |
url |
http://dx.doi.org/10.1016/j.ceramint.2017.07.089 http://hdl.handle.net/11449/169926 |
identifier_str_mv |
Ceramics International, v. 43, n. 16, p. 13759-13764, 2017. 0272-8842 10.1016/j.ceramint.2017.07.089 2-s2.0-85023746991 2-s2.0-85023746991.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ceramics International 0,784 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
13759-13764 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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_ |
1799964556650348544 |