Mostrar el registro sencillo del ítem
dc.contributor.author
Mogni, Liliana Verónica
dc.contributor.author
Prado, Fernando Daniel
dc.contributor.author
Caneiro, Alberto
dc.date.available
2019-03-26T16:02:57Z
dc.date.issued
2006-08
dc.identifier.citation
Mogni, Liliana Verónica; Prado, Fernando Daniel; Caneiro, Alberto; Defect structure and electrical conductivity of the ruddlesden-popper phases Sr3FeMO6+δ (M = Co, Ni); American Chemical Society; Chemistry Of Materials; 18; 17; 8-2006; 4163-4170
dc.identifier.issn
0897-4756
dc.identifier.uri
http://hdl.handle.net/11336/72547
dc.description.abstract
In this work, we report a systematic study of the oxygen nonstoichiometry, high-temperature thermodynamics, and transport properties of the perovskite-related mixed conductor Sr3FeMO6+δ (M = Co, Ni). Thermogravimetry was used to determine the oxygen content change (6+δ) as a function of temperature (T) and equilibrium oxygen partial pressure (pO2) within the range 1 × 10-5 atm < pO2 < 1 atm and 400 °C ≤ T ≤ 1000 °C. From the experimental values of the oxygen chemical potential (μo2), we determined both the partial molar enthalpy (ho2) and the partial molar entropy (so2) for the composition range 5.9 <6+δ < 6.6. Thermodynamic data were fitted using a straightforward defect model. The model was deduced from the mass action law assuming oxygen-vacancy formation and involving different fractions of localized and delocalized charge carriers in iron sites and the metal transition M3d-O2p band, respectively. Electrical resistivity measurements as a function of pO2 at constant temperature were performed in the 650 °C ≤ T ≤ 1000 °C temperature range for Sr3FeCoO6+δ and Sr3FeNiO 6+δ compounds. The activation energy values for the electrical-transport process at constant oxygen content values were obtained from the combination of electrical conductivity and thermogravimetry data. The electrical conductivity data are discussed within the frame of large polaron behavior in agreement with the thermodynamic data. © 2006 American Chemical Society.
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.classification
Otras Ciencias Químicas
dc.subject.classification
Ciencias Químicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Defect structure and electrical conductivity of the ruddlesden-popper phases Sr3FeMO6+δ (M = Co, Ni)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-03-15T19:23:45Z
dc.journal.volume
18
dc.journal.number
17
dc.journal.pagination
4163-4170
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington
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; Argentina. 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/abs/10.1021/cm0604007
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1021/cm0604007
Archivos asociados