Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy

Detalhes bibliográficos
Autor(a) principal: Selvaraj, Nivas Babu
Data de Publicação: 2018
Outros Autores: Fernandes, Manuela, Reaney, Ian M., Abrantes, João C.C., Denneulin, Thibaud, Snoeck, Etienne, Vilarinho, Paula Maria, Senos, Ana Maria
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/37368
Resumo: igh quality factor and a temperature stable resonant frequency make BaLa4Ti4O15 (BLT) ceramics attractive materials for microwave applications. Aiming to exploit the effects of external stresses on the development of textured and anisotropic microstructures to optimise MW properties, the influence of applied external pressure during sintering of BLT ceramics is analysed. HRTEM and geometric phase analysis (GPA) showed that stresses applied during sintering, trigger the nucleation and growth of faults hypothesised to be due to the errors in the AO3 layer (basal plane) stacking sequence of the hexagonal perovskite structure. The results reveal a strong correlation between the high concentration of structural defects and the development of anisotropic microstructures, which tune the properties of BLT. Stresses applied during sintering are therefore a promising tool to design material properties.
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spelling Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopyStressSinteringBarium lanthanum titanateHigh resolution transmission electron microscopyMicrostructureGeometric phase analysisigh quality factor and a temperature stable resonant frequency make BaLa4Ti4O15 (BLT) ceramics attractive materials for microwave applications. Aiming to exploit the effects of external stresses on the development of textured and anisotropic microstructures to optimise MW properties, the influence of applied external pressure during sintering of BLT ceramics is analysed. HRTEM and geometric phase analysis (GPA) showed that stresses applied during sintering, trigger the nucleation and growth of faults hypothesised to be due to the errors in the AO3 layer (basal plane) stacking sequence of the hexagonal perovskite structure. The results reveal a strong correlation between the high concentration of structural defects and the development of anisotropic microstructures, which tune the properties of BLT. Stresses applied during sintering are therefore a promising tool to design material properties.Elsevier2023-04-26T15:46:49Z2018-08-01T00:00:00Z2018-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/37368eng1044-580310.1016/j.matchar.2018.04.054Selvaraj, Nivas BabuFernandes, ManuelaReaney, Ian M.Abrantes, João C.C.Denneulin, ThibaudSnoeck, EtienneVilarinho, Paula MariaSenos, Ana Mariainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:12:08Zoai:ria.ua.pt:10773/37368Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:07:59.140587Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
title Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
spellingShingle Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
Selvaraj, Nivas Babu
Stress
Sintering
Barium lanthanum titanate
High resolution transmission electron microscopy
Microstructure
Geometric phase analysis
title_short Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
title_full Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
title_fullStr Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
title_full_unstemmed Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
title_sort Linking sintering stresses to nano modification in the microstructure of BaLa4Ti4O15 by transmission electron microscopy
author Selvaraj, Nivas Babu
author_facet Selvaraj, Nivas Babu
Fernandes, Manuela
Reaney, Ian M.
Abrantes, João C.C.
Denneulin, Thibaud
Snoeck, Etienne
Vilarinho, Paula Maria
Senos, Ana Maria
author_role author
author2 Fernandes, Manuela
Reaney, Ian M.
Abrantes, João C.C.
Denneulin, Thibaud
Snoeck, Etienne
Vilarinho, Paula Maria
Senos, Ana Maria
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Selvaraj, Nivas Babu
Fernandes, Manuela
Reaney, Ian M.
Abrantes, João C.C.
Denneulin, Thibaud
Snoeck, Etienne
Vilarinho, Paula Maria
Senos, Ana Maria
dc.subject.por.fl_str_mv Stress
Sintering
Barium lanthanum titanate
High resolution transmission electron microscopy
Microstructure
Geometric phase analysis
topic Stress
Sintering
Barium lanthanum titanate
High resolution transmission electron microscopy
Microstructure
Geometric phase analysis
description igh quality factor and a temperature stable resonant frequency make BaLa4Ti4O15 (BLT) ceramics attractive materials for microwave applications. Aiming to exploit the effects of external stresses on the development of textured and anisotropic microstructures to optimise MW properties, the influence of applied external pressure during sintering of BLT ceramics is analysed. HRTEM and geometric phase analysis (GPA) showed that stresses applied during sintering, trigger the nucleation and growth of faults hypothesised to be due to the errors in the AO3 layer (basal plane) stacking sequence of the hexagonal perovskite structure. The results reveal a strong correlation between the high concentration of structural defects and the development of anisotropic microstructures, which tune the properties of BLT. Stresses applied during sintering are therefore a promising tool to design material properties.
publishDate 2018
dc.date.none.fl_str_mv 2018-08-01T00:00:00Z
2018-08
2023-04-26T15:46:49Z
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://hdl.handle.net/10773/37368
url http://hdl.handle.net/10773/37368
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1044-5803
10.1016/j.matchar.2018.04.054
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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