Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties

Detalhes bibliográficos
Autor(a) principal: Carregosa, João D.C.
Data de Publicação: 2020
Outros Autores: Grilo, João P.F., Godoi, Glauber S., Macedo, Daniel A., Nascimento, Rubens M., Oliveira, Rosane M.P.B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/37665
Resumo: This work reports the microstructural (XRD/SEM), dilatometric and electrical characterization (impedance spectroscopy) of ceria (CeO2) obtained by microwave-assisted hydrothermal synthesis under mild conditions (T = 120 °C and short reaction times of 10 and 20 min). The as-prepared and calcined powders show characteristic diffraction peaks of the cubic fluorite-type structure of cerium oxide. A remarkable sinterability allows obtaining dense ceramics (relative densities exceeding 95%) with enhanced electrical properties (σt = 2.14 × 10−5 S cm−1 at 500 °C) after sintering at a temperature as low as 1200 °C.
id RCAP_2c74994a768074b928c86676a0cd9132
oai_identifier_str oai:ria.ua.pt:10773/37665
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical propertiesMicrowave-assisted hydrothermal synthesisCeramicsCeO2DilatometryElectrical propertiesThis work reports the microstructural (XRD/SEM), dilatometric and electrical characterization (impedance spectroscopy) of ceria (CeO2) obtained by microwave-assisted hydrothermal synthesis under mild conditions (T = 120 °C and short reaction times of 10 and 20 min). The as-prepared and calcined powders show characteristic diffraction peaks of the cubic fluorite-type structure of cerium oxide. A remarkable sinterability allows obtaining dense ceramics (relative densities exceeding 95%) with enhanced electrical properties (σt = 2.14 × 10−5 S cm−1 at 500 °C) after sintering at a temperature as low as 1200 °C.Elsevier2023-05-11T08:48:09Z2020-10-01T00:00:00Z2020-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/37665eng0272-884210.1016/j.ceramint.2020.06.021Carregosa, João D.C.Grilo, João P.F.Godoi, Glauber S.Macedo, Daniel A.Nascimento, Rubens M.Oliveira, Rosane M.P.B.info: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:RCAAP2024-02-22T12:12:53Zoai:ria.ua.pt:10773/37665Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:08:16.099918Repositório 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 Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
title Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
spellingShingle Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
Carregosa, João D.C.
Microwave-assisted hydrothermal synthesis
Ceramics
CeO2
Dilatometry
Electrical properties
title_short Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
title_full Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
title_fullStr Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
title_full_unstemmed Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
title_sort Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
author Carregosa, João D.C.
author_facet Carregosa, João D.C.
Grilo, João P.F.
Godoi, Glauber S.
Macedo, Daniel A.
Nascimento, Rubens M.
Oliveira, Rosane M.P.B.
author_role author
author2 Grilo, João P.F.
Godoi, Glauber S.
Macedo, Daniel A.
Nascimento, Rubens M.
Oliveira, Rosane M.P.B.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Carregosa, João D.C.
Grilo, João P.F.
Godoi, Glauber S.
Macedo, Daniel A.
Nascimento, Rubens M.
Oliveira, Rosane M.P.B.
dc.subject.por.fl_str_mv Microwave-assisted hydrothermal synthesis
Ceramics
CeO2
Dilatometry
Electrical properties
topic Microwave-assisted hydrothermal synthesis
Ceramics
CeO2
Dilatometry
Electrical properties
description This work reports the microstructural (XRD/SEM), dilatometric and electrical characterization (impedance spectroscopy) of ceria (CeO2) obtained by microwave-assisted hydrothermal synthesis under mild conditions (T = 120 °C and short reaction times of 10 and 20 min). The as-prepared and calcined powders show characteristic diffraction peaks of the cubic fluorite-type structure of cerium oxide. A remarkable sinterability allows obtaining dense ceramics (relative densities exceeding 95%) with enhanced electrical properties (σt = 2.14 × 10−5 S cm−1 at 500 °C) after sintering at a temperature as low as 1200 °C.
publishDate 2020
dc.date.none.fl_str_mv 2020-10-01T00:00:00Z
2020-10-01
2023-05-11T08:48:09Z
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/10773/37665
url http://hdl.handle.net/10773/37665
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0272-8842
10.1016/j.ceramint.2020.06.021
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
_version_ 1799137735791869952

Registros relacionados