Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
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.2020.09.102 http://hdl.handle.net/11449/205225 |
Resumo: | The effects of Yttrium-doped Barium Zirconate (BZY) synthesis steps by solid-state reaction and the number of starting reactants (2 or 3) on the characteristics of the synthesized ceramic powders were investigated. The slow diffusion rate associated with this synthesis route and the calcination steps used in this work lead to an incomplete synthesis reaction. This condition proved to be useful to improve densification during sintering for undoped samples by emulating the reactive sintering technique with transient reactions originating from the residual BaCO3 reactant. The effects of a low concentration (1 mol%) of ZnO as sintering aid on microstructure and electrical conductivity were also investigated and used for comparison to undoped samples. Electrical properties were analyzed and correlated with microstructural and compositional characteristics. Dense undoped BZY samples (99% of relative density) with high proton conductivity (2.4×10−2S/cm at 600 °C) were obtained by sintering at 1500 °C, while ZnO-doped samples achieved high relative density (97%) at only 1300 °C, but with lower electrical conductivity (7.8×10−3 S/cm at 600 °C). |
id |
UNSP_54e7100f2a1291ebbdcc5e11cc38afb8 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/205225 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aidsCeramic processingPCFCProtonic conductivitySolid-state reactionYttrium-doped barium zirconateThe effects of Yttrium-doped Barium Zirconate (BZY) synthesis steps by solid-state reaction and the number of starting reactants (2 or 3) on the characteristics of the synthesized ceramic powders were investigated. The slow diffusion rate associated with this synthesis route and the calcination steps used in this work lead to an incomplete synthesis reaction. This condition proved to be useful to improve densification during sintering for undoped samples by emulating the reactive sintering technique with transient reactions originating from the residual BaCO3 reactant. The effects of a low concentration (1 mol%) of ZnO as sintering aid on microstructure and electrical conductivity were also investigated and used for comparison to undoped samples. Electrical properties were analyzed and correlated with microstructural and compositional characteristics. Dense undoped BZY samples (99% of relative density) with high proton conductivity (2.4×10−2S/cm at 600 °C) were obtained by sintering at 1500 °C, while ZnO-doped samples achieved high relative density (97%) at only 1300 °C, but with lower electrical conductivity (7.8×10−3 S/cm at 600 °C).Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Graduate Program in Materials Science and Engineering Department of Materials Engineering Federal University of São Carlos (UFSCar)São Paulo State University (UNESP) School of Sciences and EngineeringSão Paulo State University (UNESP) School of Sciences and EngineeringCAPES: 001CAPES: 88882.332711/2019–01Universidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Goulart, Celso AntonioVillas-Boas, Lúcia Adriana [UNESP]Morelli, Márcio RaymundoSouza, Dulcina Pinatti Ferreira de2021-06-25T10:11:57Z2021-06-25T10:11:57Z2021-01-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2565-2571http://dx.doi.org/10.1016/j.ceramint.2020.09.102Ceramics International, v. 47, n. 2, p. 2565-2571, 2021.0272-8842http://hdl.handle.net/11449/20522510.1016/j.ceramint.2020.09.1022-s2.0-85091612340Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramics Internationalinfo:eu-repo/semantics/openAccess2021-10-23T12:19:07Zoai:repositorio.unesp.br:11449/205225Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:06:45.662927Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids |
title |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids |
spellingShingle |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids Goulart, Celso Antonio Ceramic processing PCFC Protonic conductivity Solid-state reaction Yttrium-doped barium zirconate |
title_short |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids |
title_full |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids |
title_fullStr |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids |
title_full_unstemmed |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids |
title_sort |
Reactive sintering of yttrium-doped barium zirconate (BaZr0.8Y0.2O3-δ) without sintering aids |
author |
Goulart, Celso Antonio |
author_facet |
Goulart, Celso Antonio Villas-Boas, Lúcia Adriana [UNESP] Morelli, Márcio Raymundo Souza, Dulcina Pinatti Ferreira de |
author_role |
author |
author2 |
Villas-Boas, Lúcia Adriana [UNESP] Morelli, Márcio Raymundo Souza, Dulcina Pinatti Ferreira de |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Goulart, Celso Antonio Villas-Boas, Lúcia Adriana [UNESP] Morelli, Márcio Raymundo Souza, Dulcina Pinatti Ferreira de |
dc.subject.por.fl_str_mv |
Ceramic processing PCFC Protonic conductivity Solid-state reaction Yttrium-doped barium zirconate |
topic |
Ceramic processing PCFC Protonic conductivity Solid-state reaction Yttrium-doped barium zirconate |
description |
The effects of Yttrium-doped Barium Zirconate (BZY) synthesis steps by solid-state reaction and the number of starting reactants (2 or 3) on the characteristics of the synthesized ceramic powders were investigated. The slow diffusion rate associated with this synthesis route and the calcination steps used in this work lead to an incomplete synthesis reaction. This condition proved to be useful to improve densification during sintering for undoped samples by emulating the reactive sintering technique with transient reactions originating from the residual BaCO3 reactant. The effects of a low concentration (1 mol%) of ZnO as sintering aid on microstructure and electrical conductivity were also investigated and used for comparison to undoped samples. Electrical properties were analyzed and correlated with microstructural and compositional characteristics. Dense undoped BZY samples (99% of relative density) with high proton conductivity (2.4×10−2S/cm at 600 °C) were obtained by sintering at 1500 °C, while ZnO-doped samples achieved high relative density (97%) at only 1300 °C, but with lower electrical conductivity (7.8×10−3 S/cm at 600 °C). |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:11:57Z 2021-06-25T10:11:57Z 2021-01-15 |
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.2020.09.102 Ceramics International, v. 47, n. 2, p. 2565-2571, 2021. 0272-8842 http://hdl.handle.net/11449/205225 10.1016/j.ceramint.2020.09.102 2-s2.0-85091612340 |
url |
http://dx.doi.org/10.1016/j.ceramint.2020.09.102 http://hdl.handle.net/11449/205225 |
identifier_str_mv |
Ceramics International, v. 47, n. 2, p. 2565-2571, 2021. 0272-8842 10.1016/j.ceramint.2020.09.102 2-s2.0-85091612340 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ceramics International |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2565-2571 |
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_ |
1808129584450764800 |