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dc.contributor.author
Mogni, Liliana Verónica
dc.contributor.author
Prado, Fernando Daniel
dc.contributor.author
Cuello, Gabriel Julio
dc.contributor.author
Caneiro, Alberto
dc.date.available
2019-02-11T20:56:37Z
dc.date.issued
2009-07-21
dc.identifier.citation
Mogni, Liliana Verónica; Prado, Fernando Daniel; Cuello, Gabriel Julio; Caneiro, Alberto; Study of the Crystal Chemistry of the n = 2 Ruddlesden−Popper Phases Sr3FeMO6+δ (M = Fe, Co, and Ni) Using in Situ High Temperature Neutron Powder Diffraction; American Chemical Society; Chemistry Of Materials; 21; 13; 21-7-2009; 2614-2623
dc.identifier.issn
0897-4756
dc.identifier.uri
http://hdl.handle.net/11336/69938
dc.description.abstract
Effects of the substitution of Fe by Co or Ni on the crystal structure of the n = 2 Ruddlesden-Popper phase Sr3Fe2O 6+ δ have been studied by in situ high temperature neutron powder diffraction (NPD) in the temperature range 20 °C ≤ T ≤ 900°C. The analysis of neutron diffraction data confirmed that for a given temperature the oxygen non-stoichiometry increases when Fe is replaced by Co or Ni. Oxygen vacancies were detected at the crystal sites O(1), connecting the octahedra along the oaxis, and O(3) in the FeO2 planes of the perovskite layers. The substitution of Fe by Co or Ni increases the oxygen vacancy concentration at the O(3) crystal site, which were detected even when the total oxygen content was higher than 6.00. This result supports a diffusion mechanism involving the migration of oxide ions from the O(3) site to its adjacent empty O(1) sites and vice versa. The average linear expansion αave≈ 1/3 αvol calculated from NPD data increases with the substitution of Fe by Co or Ni (19.9,25.1, and 22.7 × 10-6K-1for M = Fe, Co and Ni, respectively). The expansion along the c-axis(αc) affects mainly the perovskite block while the width of the rock-salt block remains constant. The crystal structure expansion is discussed considering the thermal and chemical contributions, along with the effect of the increasing delocalization of charge carriers when Fe is renlaced with Co or Ni.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Oxidos Conductores Mixtos
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Fases de Ruddlesden Popper
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Cátodo de Sofc
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Neutrones
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Study of the Crystal Chemistry of the n = 2 Ruddlesden−Popper Phases Sr3FeMO6+δ (M = Fe, Co, and Ni) Using in Situ High Temperature Neutron Powder Diffraction
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-01-23T19:10:58Z
dc.journal.volume
21
dc.journal.number
13
dc.journal.pagination
2614-2623
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington DC
dc.description.fil
Fil: Mogni, Liliana Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.description.fil
Fil: Prado, Fernando Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.description.fil
Fil: Cuello, Gabriel Julio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Institut Laue Langevin; Francia. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.description.fil
Fil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.journal.title
Chemistry Of Materials
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/cm900643e
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/cm900643e
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