Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0)
- Autores
- Vega Castillo, Jesús Eduardo; Ravella, Uday K.; Corbel, Gwenaël; Lacorre, Philippe; Caneiro, Alberto
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The role of W content on the limit oxygen partial pressure (pO2) for stability of fast oxygen-ion conductors La2Mo2−yWyO9 with y = 0, 0.5 and 1.0 has been studied by means of thermogravimetric analysis (TGA) under controlled atmospheres. At 718 °C, below the pO2 stability limit of La2Mo2−yWyO9, the perovskite related compounds La7Mo7(2−y)/2W7y/2O30 were stabilized even for y = 1.0. At 608 °C, the first stage of reduction of β-La2Mo2−yWyO9 leads to the formation of the crystallized oxygen deficient La2Mo2−yWyO8.6+0.02y phase. X-ray powder diffraction shows that the stabilization of the high temperature β-form through tungsten substitution observed in fully oxidized La2Mo2−yWyO9 samples is preserved upon slight reduction. The n-type conductivity arising from the mixed valence state of molybdenum becomes less and less predominant as the W content increases. Further reduction causes amorphization. At both temperatures, W substitution does not enhance the thermodynamic stability of the La2Mo2−yWyO9 ion conductor under a reducing atmosphere but only slows down the kinetics of reduction.
Fil: Vega Castillo, Jesús Eduardo. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina
Fil: Ravella, Uday K.. Université du Maine. Institut des Molécules et Matériaux du Mans; Francia
Fil: Corbel, Gwenaël. Université du Maine. Institut des Molécules et Matériaux du Mans; Francia
Fil: Lacorre, Philippe. Université du Maine. Institut des Molécules et Matériaux du Mans; Argentina
Fil: Caneiro, Alberto. Comisión Nacional de Energía Atómica; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina - Materia
-
Lamox
Thermodynamic
Stability - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/3576
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CONICET Digital (CONICET) |
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Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0)Vega Castillo, Jesús EduardoRavella, Uday K.Corbel, GwenaëlLacorre, PhilippeCaneiro, AlbertoLamoxThermodynamicStabilityhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The role of W content on the limit oxygen partial pressure (pO2) for stability of fast oxygen-ion conductors La2Mo2−yWyO9 with y = 0, 0.5 and 1.0 has been studied by means of thermogravimetric analysis (TGA) under controlled atmospheres. At 718 °C, below the pO2 stability limit of La2Mo2−yWyO9, the perovskite related compounds La7Mo7(2−y)/2W7y/2O30 were stabilized even for y = 1.0. At 608 °C, the first stage of reduction of β-La2Mo2−yWyO9 leads to the formation of the crystallized oxygen deficient La2Mo2−yWyO8.6+0.02y phase. X-ray powder diffraction shows that the stabilization of the high temperature β-form through tungsten substitution observed in fully oxidized La2Mo2−yWyO9 samples is preserved upon slight reduction. The n-type conductivity arising from the mixed valence state of molybdenum becomes less and less predominant as the W content increases. Further reduction causes amorphization. At both temperatures, W substitution does not enhance the thermodynamic stability of the La2Mo2−yWyO9 ion conductor under a reducing atmosphere but only slows down the kinetics of reduction.Fil: Vega Castillo, Jesús Eduardo. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; ArgentinaFil: Ravella, Uday K.. Université du Maine. Institut des Molécules et Matériaux du Mans; FranciaFil: Corbel, Gwenaël. Université du Maine. Institut des Molécules et Matériaux du Mans; FranciaFil: Lacorre, Philippe. Université du Maine. Institut des Molécules et Matériaux du Mans; ArgentinaFil: Caneiro, Alberto. Comisión Nacional de Energía Atómica; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; ArgentinaRoyal Society of Chemistry2013-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/3576Vega Castillo, Jesús Eduardo; Ravella, Uday K.; Corbel, Gwenaël; Lacorre, Philippe; Caneiro, Alberto; Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0); Royal Society of Chemistry; Dalton Transactions; 43; 6; 11-2013; 2661-26691477-9226enginfo:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2014/DT/C3DT52174E#!divAbstractinfo:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/DOI:10.1039/C3DT52174Einfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:31:02Zoai:ri.conicet.gov.ar:11336/3576instacron: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:34982025-09-29 10:31:03.037CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) |
title |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) |
spellingShingle |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) Vega Castillo, Jesús Eduardo Lamox Thermodynamic Stability |
title_short |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) |
title_full |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) |
title_fullStr |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) |
title_full_unstemmed |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) |
title_sort |
Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) |
dc.creator.none.fl_str_mv |
Vega Castillo, Jesús Eduardo Ravella, Uday K. Corbel, Gwenaël Lacorre, Philippe Caneiro, Alberto |
author |
Vega Castillo, Jesús Eduardo |
author_facet |
Vega Castillo, Jesús Eduardo Ravella, Uday K. Corbel, Gwenaël Lacorre, Philippe Caneiro, Alberto |
author_role |
author |
author2 |
Ravella, Uday K. Corbel, Gwenaël Lacorre, Philippe Caneiro, Alberto |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Lamox Thermodynamic Stability |
topic |
Lamox Thermodynamic Stability |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The role of W content on the limit oxygen partial pressure (pO2) for stability of fast oxygen-ion conductors La2Mo2−yWyO9 with y = 0, 0.5 and 1.0 has been studied by means of thermogravimetric analysis (TGA) under controlled atmospheres. At 718 °C, below the pO2 stability limit of La2Mo2−yWyO9, the perovskite related compounds La7Mo7(2−y)/2W7y/2O30 were stabilized even for y = 1.0. At 608 °C, the first stage of reduction of β-La2Mo2−yWyO9 leads to the formation of the crystallized oxygen deficient La2Mo2−yWyO8.6+0.02y phase. X-ray powder diffraction shows that the stabilization of the high temperature β-form through tungsten substitution observed in fully oxidized La2Mo2−yWyO9 samples is preserved upon slight reduction. The n-type conductivity arising from the mixed valence state of molybdenum becomes less and less predominant as the W content increases. Further reduction causes amorphization. At both temperatures, W substitution does not enhance the thermodynamic stability of the La2Mo2−yWyO9 ion conductor under a reducing atmosphere but only slows down the kinetics of reduction. Fil: Vega Castillo, Jesús Eduardo. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina Fil: Ravella, Uday K.. Université du Maine. Institut des Molécules et Matériaux du Mans; Francia Fil: Corbel, Gwenaël. Université du Maine. Institut des Molécules et Matériaux du Mans; Francia Fil: Lacorre, Philippe. Université du Maine. Institut des Molécules et Matériaux du Mans; Argentina Fil: Caneiro, Alberto. Comisión Nacional de Energía Atómica; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina |
description |
The role of W content on the limit oxygen partial pressure (pO2) for stability of fast oxygen-ion conductors La2Mo2−yWyO9 with y = 0, 0.5 and 1.0 has been studied by means of thermogravimetric analysis (TGA) under controlled atmospheres. At 718 °C, below the pO2 stability limit of La2Mo2−yWyO9, the perovskite related compounds La7Mo7(2−y)/2W7y/2O30 were stabilized even for y = 1.0. At 608 °C, the first stage of reduction of β-La2Mo2−yWyO9 leads to the formation of the crystallized oxygen deficient La2Mo2−yWyO8.6+0.02y phase. X-ray powder diffraction shows that the stabilization of the high temperature β-form through tungsten substitution observed in fully oxidized La2Mo2−yWyO9 samples is preserved upon slight reduction. The n-type conductivity arising from the mixed valence state of molybdenum becomes less and less predominant as the W content increases. Further reduction causes amorphization. At both temperatures, W substitution does not enhance the thermodynamic stability of the La2Mo2−yWyO9 ion conductor under a reducing atmosphere but only slows down the kinetics of reduction. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-11 |
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/11336/3576 Vega Castillo, Jesús Eduardo; Ravella, Uday K.; Corbel, Gwenaël; Lacorre, Philippe; Caneiro, Alberto; Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0); Royal Society of Chemistry; Dalton Transactions; 43; 6; 11-2013; 2661-2669 1477-9226 |
url |
http://hdl.handle.net/11336/3576 |
identifier_str_mv |
Vega Castillo, Jesús Eduardo; Ravella, Uday K.; Corbel, Gwenaël; Lacorre, Philippe; Caneiro, Alberto; Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0); Royal Society of Chemistry; Dalton Transactions; 43; 6; 11-2013; 2661-2669 1477-9226 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2014/DT/C3DT52174E#!divAbstract info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/DOI:10.1039/C3DT52174E |
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 |
dc.publisher.none.fl_str_mv |
Royal Society of Chemistry |
publisher.none.fl_str_mv |
Royal Society of Chemistry |
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 |
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1844614319867691008 |
score |
13.070432 |