Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.2298/PAC1904360F http://hdl.handle.net/11449/201564 |
Resumo: | Low resistive electrodes based on Co and Mo co-doped SnO2 were prepared by the conventional solid-state reaction and sintered at 1250 °C for 2 h. Concentration of Co2O3 precursor was unchanged (1 mol%), while MoO3 was varied (0.25, 0.50 to 0.75 mol%) to promote conductivity. The structural and microstructural characterization revealed that the samples have a rutile-type structure without secondary phases and large rutile grains with low porosity. Electrical measurements on DC mode have shown a semiconductor behaviour of the SnO2 samples doped with 0.25 and 0.75 at. % of Mo at temperatures below 50 K, indicating their suitability for low-temperature electronic applications. Impedance measurements indicate reduced energy barriers of less than 1 meV formed between highly conductive crystallites for the SnO2 samples doped with 0.25 and 0.75 at. % of Mo. The sample with Mo content of 0.50 at. % presented a higher energy barrier at a few hundredths of eV, with space charges at the crystallite boundaries. |
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Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2Co/Mo co-doped SnO2Complex impedance spectroscopyLow-temperature electronic applicationsLow resistive electrodes based on Co and Mo co-doped SnO2 were prepared by the conventional solid-state reaction and sintered at 1250 °C for 2 h. Concentration of Co2O3 precursor was unchanged (1 mol%), while MoO3 was varied (0.25, 0.50 to 0.75 mol%) to promote conductivity. The structural and microstructural characterization revealed that the samples have a rutile-type structure without secondary phases and large rutile grains with low porosity. Electrical measurements on DC mode have shown a semiconductor behaviour of the SnO2 samples doped with 0.25 and 0.75 at. % of Mo at temperatures below 50 K, indicating their suitability for low-temperature electronic applications. Impedance measurements indicate reduced energy barriers of less than 1 meV formed between highly conductive crystallites for the SnO2 samples doped with 0.25 and 0.75 at. % of Mo. The sample with Mo content of 0.50 at. % presented a higher energy barrier at a few hundredths of eV, with space charges at the crystallite boundaries.Universidade Federal de Itajubá Unifei-Campus Itabira, Rua Irmã Ivone Drumond, 200, Distrito Industrial IIUniversidade Federal de Itajubá Unifei-Campus Itajubá, Av. BPS, 1303, Bairro PinheirinhoUniversity of Mar del Plata (UNMdP) Institute of Materials Science and Technology (INTEMA) National Research Council (CONICET), Av. Juan B. Justo 4302Federal University of São Carlos (UFSCar)Sao Paulo State University (Unesp) School of EngineeringSao Paulo State University (Unesp) School of EngineeringUnifei-Campus ItabiraUnifei-Campus ItajubáNational Research Council (CONICET)Universidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Ferreira, Diego H.O.Vaz, Isabela C.F.Rubinger, Rero M.Buono, CamilaRocha, Leandro S.R.Ponce, Miguel A.Longo, ElsonSimões, Alexandre Z. [UNESP]Moura, Francisco2020-12-12T02:35:58Z2020-12-12T02:35:58Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article360-367http://dx.doi.org/10.2298/PAC1904360FProcessing and Application of Ceramics, v. 13, n. 4, p. 360-367, 2019.2406-10341820-6131http://hdl.handle.net/11449/20156410.2298/PAC1904360F2-s2.0-85079646148Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProcessing and Application of Ceramicsinfo:eu-repo/semantics/openAccess2024-07-02T15:03:45Zoai:repositorio.unesp.br:11449/201564Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:55:25.365817Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 |
title |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 |
spellingShingle |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 Ferreira, Diego H.O. Co/Mo co-doped SnO2 Complex impedance spectroscopy Low-temperature electronic applications |
title_short |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 |
title_full |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 |
title_fullStr |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 |
title_full_unstemmed |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 |
title_sort |
Low-temperature impedance spectroscopic analyses of ceramic electrodes based on Mo and Co co-doped SnO2 |
author |
Ferreira, Diego H.O. |
author_facet |
Ferreira, Diego H.O. Vaz, Isabela C.F. Rubinger, Rero M. Buono, Camila Rocha, Leandro S.R. Ponce, Miguel A. Longo, Elson Simões, Alexandre Z. [UNESP] Moura, Francisco |
author_role |
author |
author2 |
Vaz, Isabela C.F. Rubinger, Rero M. Buono, Camila Rocha, Leandro S.R. Ponce, Miguel A. Longo, Elson Simões, Alexandre Z. [UNESP] Moura, Francisco |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Unifei-Campus Itabira Unifei-Campus Itajubá National Research Council (CONICET) Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Ferreira, Diego H.O. Vaz, Isabela C.F. Rubinger, Rero M. Buono, Camila Rocha, Leandro S.R. Ponce, Miguel A. Longo, Elson Simões, Alexandre Z. [UNESP] Moura, Francisco |
dc.subject.por.fl_str_mv |
Co/Mo co-doped SnO2 Complex impedance spectroscopy Low-temperature electronic applications |
topic |
Co/Mo co-doped SnO2 Complex impedance spectroscopy Low-temperature electronic applications |
description |
Low resistive electrodes based on Co and Mo co-doped SnO2 were prepared by the conventional solid-state reaction and sintered at 1250 °C for 2 h. Concentration of Co2O3 precursor was unchanged (1 mol%), while MoO3 was varied (0.25, 0.50 to 0.75 mol%) to promote conductivity. The structural and microstructural characterization revealed that the samples have a rutile-type structure without secondary phases and large rutile grains with low porosity. Electrical measurements on DC mode have shown a semiconductor behaviour of the SnO2 samples doped with 0.25 and 0.75 at. % of Mo at temperatures below 50 K, indicating their suitability for low-temperature electronic applications. Impedance measurements indicate reduced energy barriers of less than 1 meV formed between highly conductive crystallites for the SnO2 samples doped with 0.25 and 0.75 at. % of Mo. The sample with Mo content of 0.50 at. % presented a higher energy barrier at a few hundredths of eV, with space charges at the crystallite boundaries. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 2020-12-12T02:35:58Z 2020-12-12T02:35:58Z |
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/10.2298/PAC1904360F Processing and Application of Ceramics, v. 13, n. 4, p. 360-367, 2019. 2406-1034 1820-6131 http://hdl.handle.net/11449/201564 10.2298/PAC1904360F 2-s2.0-85079646148 |
url |
http://dx.doi.org/10.2298/PAC1904360F http://hdl.handle.net/11449/201564 |
identifier_str_mv |
Processing and Application of Ceramics, v. 13, n. 4, p. 360-367, 2019. 2406-1034 1820-6131 10.2298/PAC1904360F 2-s2.0-85079646148 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Processing and Application of Ceramics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
360-367 |
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_ |
1808128721399316480 |