Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides

Autores
Acuña, Leandro Marcelo; Fuentes, Rodolfo Oscar; Fantini, Marcia C. A.; Lamas, Diego Germán
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the present work, the local order of Zr in ZrO2–CeO2 nanopowders (with 50, 65, 70, and 90 mol % CeO2) was studied by extended X-ray absorption fine structure around the Zr K-edge. In the cases of ZrO2–50 and 65 mol % CeO2, we studied how the local order is affected by the phase transition at high temperature. In order to study the tetragonal-cubic phase transition as a function of temperature, high-temperature synchrotron radiation X-ray powder diffraction (SR-XPD) was employed. We explored different models of the local atomic structure and interpreted them as distortions of the accepted long-range order deduced by XPD analyses. The results suggested the existence of distortions in the oxygen sublattice, which can be accounted for as displacements of the oxygen atoms along the (110) direction of the pseudofluorite unit cell that cannot be observed by XPD because of the random nature of these displacements.
Fil: Acuña, Leandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; Argentina
Fil: Fuentes, Rodolfo Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina
Fil: Fantini, Marcia C. A.. Universidade de Sao Paulo; Brasil
Fil: Lamas, Diego Germán. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Nanopowders
It-Sofc
Xrd
Zirconia-Ceria
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/31849
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed OxidesAcuña, Leandro MarceloFuentes, Rodolfo OscarFantini, Marcia C. A.Lamas, Diego GermánNanopowdersIt-SofcXrdZirconia-Ceriahttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2In the present work, the local order of Zr in ZrO2–CeO2 nanopowders (with 50, 65, 70, and 90 mol % CeO2) was studied by extended X-ray absorption fine structure around the Zr K-edge. In the cases of ZrO2–50 and 65 mol % CeO2, we studied how the local order is affected by the phase transition at high temperature. In order to study the tetragonal-cubic phase transition as a function of temperature, high-temperature synchrotron radiation X-ray powder diffraction (SR-XPD) was employed. We explored different models of the local atomic structure and interpreted them as distortions of the accepted long-range order deduced by XPD analyses. The results suggested the existence of distortions in the oxygen sublattice, which can be accounted for as displacements of the oxygen atoms along the (110) direction of the pseudofluorite unit cell that cannot be observed by XPD because of the random nature of these displacements.Fil: Acuña, Leandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; ArgentinaFil: Fuentes, Rodolfo Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; ArgentinaFil: Fantini, Marcia C. A.. Universidade de Sao Paulo; BrasilFil: Lamas, Diego Germán. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Chemical Society2014-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/31849Lamas, Diego Germán; Fantini, Marcia C. A.; Fuentes, Rodolfo Oscar; Acuña, Leandro Marcelo; Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides; American Chemical Society; Journal of Physical Chemistry C; 118; 21; 5-2014; 11445-114531932-7447CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp502457winfo:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/jp502457winfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:22:15Zoai:ri.conicet.gov.ar:11336/31849instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:22:15.629CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
title Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
spellingShingle Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
Acuña, Leandro Marcelo
Nanopowders
It-Sofc
Xrd
Zirconia-Ceria
title_short Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
title_full Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
title_fullStr Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
title_full_unstemmed Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
title_sort Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides
dc.creator.none.fl_str_mv Acuña, Leandro Marcelo
Fuentes, Rodolfo Oscar
Fantini, Marcia C. A.
Lamas, Diego Germán
author Acuña, Leandro Marcelo
author_facet Acuña, Leandro Marcelo
Fuentes, Rodolfo Oscar
Fantini, Marcia C. A.
Lamas, Diego Germán
author_role author
author2 Fuentes, Rodolfo Oscar
Fantini, Marcia C. A.
Lamas, Diego Germán
author2_role author
author
author
dc.subject.none.fl_str_mv Nanopowders
It-Sofc
Xrd
Zirconia-Ceria
topic Nanopowders
It-Sofc
Xrd
Zirconia-Ceria
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv In the present work, the local order of Zr in ZrO2–CeO2 nanopowders (with 50, 65, 70, and 90 mol % CeO2) was studied by extended X-ray absorption fine structure around the Zr K-edge. In the cases of ZrO2–50 and 65 mol % CeO2, we studied how the local order is affected by the phase transition at high temperature. In order to study the tetragonal-cubic phase transition as a function of temperature, high-temperature synchrotron radiation X-ray powder diffraction (SR-XPD) was employed. We explored different models of the local atomic structure and interpreted them as distortions of the accepted long-range order deduced by XPD analyses. The results suggested the existence of distortions in the oxygen sublattice, which can be accounted for as displacements of the oxygen atoms along the (110) direction of the pseudofluorite unit cell that cannot be observed by XPD because of the random nature of these displacements.
Fil: Acuña, Leandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; Argentina
Fil: Fuentes, Rodolfo Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina
Fil: Fantini, Marcia C. A.. Universidade de Sao Paulo; Brasil
Fil: Lamas, Diego Germán. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description In the present work, the local order of Zr in ZrO2–CeO2 nanopowders (with 50, 65, 70, and 90 mol % CeO2) was studied by extended X-ray absorption fine structure around the Zr K-edge. In the cases of ZrO2–50 and 65 mol % CeO2, we studied how the local order is affected by the phase transition at high temperature. In order to study the tetragonal-cubic phase transition as a function of temperature, high-temperature synchrotron radiation X-ray powder diffraction (SR-XPD) was employed. We explored different models of the local atomic structure and interpreted them as distortions of the accepted long-range order deduced by XPD analyses. The results suggested the existence of distortions in the oxygen sublattice, which can be accounted for as displacements of the oxygen atoms along the (110) direction of the pseudofluorite unit cell that cannot be observed by XPD because of the random nature of these displacements.
publishDate 2014
dc.date.none.fl_str_mv 2014-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/31849
Lamas, Diego Germán; Fantini, Marcia C. A.; Fuentes, Rodolfo Oscar; Acuña, Leandro Marcelo; Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides; American Chemical Society; Journal of Physical Chemistry C; 118; 21; 5-2014; 11445-11453
1932-7447
CONICET Digital
CONICET
url http://hdl.handle.net/11336/31849
identifier_str_mv Lamas, Diego Germán; Fantini, Marcia C. A.; Fuentes, Rodolfo Oscar; Acuña, Leandro Marcelo; Relation between Distortions in the Oxygen Sublattice and the Local Order of Zr in Nanostructured ZrO2–CeO2 Mixed Oxides; American Chemical Society; Journal of Physical Chemistry C; 118; 21; 5-2014; 11445-11453
1932-7447
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/jp502457w
info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/jp502457w
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846082620350267392
score 13.22299

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