Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3
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/PAC1904333V http://hdl.handle.net/11449/198538 |
Resumo: | In this work, we investigate the effects of Sr and Mn co-doping on the micro structural development and electrical properties of LaAlO3 synthesised by solid state reaction and sintered at 1500 and 1600 °C The addition of Sr and Mn contributed to the crystallization and stabilization of the perovskite structure. However, the addition of Sr alone lead to the formation of heterogeneous micro structure, while the combined effect of Sr and Mn improved Al and La homogeneity in the perovskite structure. Total electrical conductivity is enhanced by three orders of magnitude with Sr addition (La08Sr02AlO3-δ: 5.74 × 10-4 S/cm at 600 °C) and five orders of magnitude with Mn co-doping (La0.8Sr0.2Al0.8Mn0.2O3-δ: 3.6 × 10-2 S/cm at 600 °C) compared to the undoped LaAlO3 (2.96 × 10-6 S/cm at 600 °C). The Sr and Mn co-doped LaAlO3 present favourable catalytic activity for electrode reactions even with a low dopant concentration (20 mol%). |
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Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3DopingElectrical conductionLaAlO3Perovskite oxidesIn this work, we investigate the effects of Sr and Mn co-doping on the micro structural development and electrical properties of LaAlO3 synthesised by solid state reaction and sintered at 1500 and 1600 °C The addition of Sr and Mn contributed to the crystallization and stabilization of the perovskite structure. However, the addition of Sr alone lead to the formation of heterogeneous micro structure, while the combined effect of Sr and Mn improved Al and La homogeneity in the perovskite structure. Total electrical conductivity is enhanced by three orders of magnitude with Sr addition (La08Sr02AlO3-δ: 5.74 × 10-4 S/cm at 600 °C) and five orders of magnitude with Mn co-doping (La0.8Sr0.2Al0.8Mn0.2O3-δ: 3.6 × 10-2 S/cm at 600 °C) compared to the undoped LaAlO3 (2.96 × 10-6 S/cm at 600 °C). The Sr and Mn co-doped LaAlO3 present favourable catalytic activity for electrode reactions even with a low dopant concentration (20 mol%).São Paulo State University (UNESP) School of Sciences and EngineeringGraduate Program in Materials Science and Engineering Department of Materials Engineering Federal University of São CarlosSão Paulo State University (UNESP) School of Sciences and EngineeringUniversidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Villas-Boas, Lúcia Adriana [UNESP]Goulart, Celso AntonioDe Souza, Dulcina Pinatti Ferreira2020-12-12T01:15:34Z2020-12-12T01:15:34Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article333-341http://dx.doi.org/10.2298/PAC1904333VProcessing and Application of Ceramics, v. 13, n. 4, p. 333-341, 2019.2406-10341820-6131http://hdl.handle.net/11449/19853810.2298/PAC1904333V2-s2.0-85079600684Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProcessing and Application of Ceramicsinfo:eu-repo/semantics/openAccess2021-10-22T14:02:52Zoai:repositorio.unesp.br:11449/198538Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T14:02:52Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 |
title |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 |
spellingShingle |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 Villas-Boas, Lúcia Adriana [UNESP] Doping Electrical conduction LaAlO3 Perovskite oxides |
title_short |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 |
title_full |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 |
title_fullStr |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 |
title_full_unstemmed |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 |
title_sort |
Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3 |
author |
Villas-Boas, Lúcia Adriana [UNESP] |
author_facet |
Villas-Boas, Lúcia Adriana [UNESP] Goulart, Celso Antonio De Souza, Dulcina Pinatti Ferreira |
author_role |
author |
author2 |
Goulart, Celso Antonio De Souza, Dulcina Pinatti Ferreira |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de São Carlos (UFSCar) |
dc.contributor.author.fl_str_mv |
Villas-Boas, Lúcia Adriana [UNESP] Goulart, Celso Antonio De Souza, Dulcina Pinatti Ferreira |
dc.subject.por.fl_str_mv |
Doping Electrical conduction LaAlO3 Perovskite oxides |
topic |
Doping Electrical conduction LaAlO3 Perovskite oxides |
description |
In this work, we investigate the effects of Sr and Mn co-doping on the micro structural development and electrical properties of LaAlO3 synthesised by solid state reaction and sintered at 1500 and 1600 °C The addition of Sr and Mn contributed to the crystallization and stabilization of the perovskite structure. However, the addition of Sr alone lead to the formation of heterogeneous micro structure, while the combined effect of Sr and Mn improved Al and La homogeneity in the perovskite structure. Total electrical conductivity is enhanced by three orders of magnitude with Sr addition (La08Sr02AlO3-δ: 5.74 × 10-4 S/cm at 600 °C) and five orders of magnitude with Mn co-doping (La0.8Sr0.2Al0.8Mn0.2O3-δ: 3.6 × 10-2 S/cm at 600 °C) compared to the undoped LaAlO3 (2.96 × 10-6 S/cm at 600 °C). The Sr and Mn co-doped LaAlO3 present favourable catalytic activity for electrode reactions even with a low dopant concentration (20 mol%). |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 2020-12-12T01:15:34Z 2020-12-12T01:15:34Z |
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/PAC1904333V Processing and Application of Ceramics, v. 13, n. 4, p. 333-341, 2019. 2406-1034 1820-6131 http://hdl.handle.net/11449/198538 10.2298/PAC1904333V 2-s2.0-85079600684 |
url |
http://dx.doi.org/10.2298/PAC1904333V http://hdl.handle.net/11449/198538 |
identifier_str_mv |
Processing and Application of Ceramics, v. 13, n. 4, p. 333-341, 2019. 2406-1034 1820-6131 10.2298/PAC1904333V 2-s2.0-85079600684 |
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 |
333-341 |
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_ |
1799964959500664832 |