Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/20.500.11960/3058 |
Resumo: | Stabilized fluorites and pyrochlores with different types of substitution in the (Nd2O3 − ZrO2 system (NdZrO)) have been studied by Raman spectroscopy, X-ray diffraction, and impedance spectroscopy methods. Ionic and proton conductivity maps for 9 compositions in the NdZrO system are presented. Oxygen partial pressure measurements show a typical ionic conductor behavior, with a significantly increase of conductivity for (Nd2−xZrx)Zr2O7+x/2 (x = 1.27) fluorite and (Nd2−xZrx)Zr2O7+x/2 (x = 0.4, 0.2) pyrochlores. For the same compositions the strong luminescence was observed. Strong luminescence and high oxygenion conductivity of these solid solutions can be associated with the presence of phases with the different degree of structural disorder (tetragonal phase, fluorite) in local nanodomains in fluorite or pyrochlore matrix in the ZrO2 − Nd2Zr2O7 region. Really, Raman spectra of (Nd2−xZrx)Zr2O7+x/2 (x = 0.5 − 0.2) solid solutions demonstrated the fluorite + pyrochlore structural type in the short-range order. Fluorite nanodomains in pyrochlore matrix (ZrO2 – Nd2Zr2O7 region) resulting from an order–disorder transition can only be detected at a radiation wavelength comparable to the fluorite nanodomain size. Thus, using Raman spectroscopy the broad isomorphism range in the ZrO2 – Nd2Zr2O7 system has been shown to be nonuniform. |
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Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneityLuminescenceNanodomainsOxygen-ion conductivityProton conductivityPyrochloresZirconatesStabilized fluorites and pyrochlores with different types of substitution in the (Nd2O3 − ZrO2 system (NdZrO)) have been studied by Raman spectroscopy, X-ray diffraction, and impedance spectroscopy methods. Ionic and proton conductivity maps for 9 compositions in the NdZrO system are presented. Oxygen partial pressure measurements show a typical ionic conductor behavior, with a significantly increase of conductivity for (Nd2−xZrx)Zr2O7+x/2 (x = 1.27) fluorite and (Nd2−xZrx)Zr2O7+x/2 (x = 0.4, 0.2) pyrochlores. For the same compositions the strong luminescence was observed. Strong luminescence and high oxygenion conductivity of these solid solutions can be associated with the presence of phases with the different degree of structural disorder (tetragonal phase, fluorite) in local nanodomains in fluorite or pyrochlore matrix in the ZrO2 − Nd2Zr2O7 region. Really, Raman spectra of (Nd2−xZrx)Zr2O7+x/2 (x = 0.5 − 0.2) solid solutions demonstrated the fluorite + pyrochlore structural type in the short-range order. Fluorite nanodomains in pyrochlore matrix (ZrO2 – Nd2Zr2O7 region) resulting from an order–disorder transition can only be detected at a radiation wavelength comparable to the fluorite nanodomain size. Thus, using Raman spectroscopy the broad isomorphism range in the ZrO2 – Nd2Zr2O7 system has been shown to be nonuniform.2023-01-02T14:35:51Z2022-01-01T00:00:00Z2022-012022-12-05T11:20:02Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/20.500.11960/3058eng0013-468610.1016/j.electacta.2021.139632Lyskov, N. V.Shchegolikhinc, A. N.Stolbov, D. N.Kolbanev, I. V.Gomes, EduardaAbrantes, JoãoShlyakhtina, A. V.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:RCAAP2023-06-08T06:45:25Zoai:repositorio.ipvc.pt:20.500.11960/3058Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:44:43.062170Repositório 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 |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity |
title |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity |
spellingShingle |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity Lyskov, N. V. Luminescence Nanodomains Oxygen-ion conductivity Proton conductivity Pyrochlores Zirconates |
title_short |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity |
title_full |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity |
title_fullStr |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity |
title_full_unstemmed |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity |
title_sort |
Study of oxygen-ion conductivity and luminescence in the ZrO2-Nd2O3 system : impact of local heterogeneity |
author |
Lyskov, N. V. |
author_facet |
Lyskov, N. V. Shchegolikhinc, A. N. Stolbov, D. N. Kolbanev, I. V. Gomes, Eduarda Abrantes, João Shlyakhtina, A. V. |
author_role |
author |
author2 |
Shchegolikhinc, A. N. Stolbov, D. N. Kolbanev, I. V. Gomes, Eduarda Abrantes, João Shlyakhtina, A. V. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Lyskov, N. V. Shchegolikhinc, A. N. Stolbov, D. N. Kolbanev, I. V. Gomes, Eduarda Abrantes, João Shlyakhtina, A. V. |
dc.subject.por.fl_str_mv |
Luminescence Nanodomains Oxygen-ion conductivity Proton conductivity Pyrochlores Zirconates |
topic |
Luminescence Nanodomains Oxygen-ion conductivity Proton conductivity Pyrochlores Zirconates |
description |
Stabilized fluorites and pyrochlores with different types of substitution in the (Nd2O3 − ZrO2 system (NdZrO)) have been studied by Raman spectroscopy, X-ray diffraction, and impedance spectroscopy methods. Ionic and proton conductivity maps for 9 compositions in the NdZrO system are presented. Oxygen partial pressure measurements show a typical ionic conductor behavior, with a significantly increase of conductivity for (Nd2−xZrx)Zr2O7+x/2 (x = 1.27) fluorite and (Nd2−xZrx)Zr2O7+x/2 (x = 0.4, 0.2) pyrochlores. For the same compositions the strong luminescence was observed. Strong luminescence and high oxygenion conductivity of these solid solutions can be associated with the presence of phases with the different degree of structural disorder (tetragonal phase, fluorite) in local nanodomains in fluorite or pyrochlore matrix in the ZrO2 − Nd2Zr2O7 region. Really, Raman spectra of (Nd2−xZrx)Zr2O7+x/2 (x = 0.5 − 0.2) solid solutions demonstrated the fluorite + pyrochlore structural type in the short-range order. Fluorite nanodomains in pyrochlore matrix (ZrO2 – Nd2Zr2O7 region) resulting from an order–disorder transition can only be detected at a radiation wavelength comparable to the fluorite nanodomain size. Thus, using Raman spectroscopy the broad isomorphism range in the ZrO2 – Nd2Zr2O7 system has been shown to be nonuniform. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01T00:00:00Z 2022-01 2022-12-05T11:20:02Z 2023-01-02T14:35:51Z |
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/20.500.11960/3058 |
url |
http://hdl.handle.net/20.500.11960/3058 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0013-4686 10.1016/j.electacta.2021.139632 |
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.source.none.fl_str_mv |
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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 |
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1799131531965366272 |