Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes

A series of chromite perovskites with the general formula Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) has been prepared by three combustion synthesis routes using a different combustible substance each time: glycine, urea and sucrose. In order to isolate the effect of divalen...

Descripción completa

Detalles Bibliográficos
Autores: Ortega-San-Martín, L., Morán-Ruiz, A., Wain-Martin, A., Vidal, K., Larrañaga, A., Laguna-Bercero, M.A., Arriortua, M.I.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:78248
Acceso en línea:http://zaguan.unizar.es/record/78248
Access Level:acceso abierto
id ES_bdd0a32c64cbdbca568c2b01e788f50f
oai_identifier_str oai:zaguan.unizar.es:78248
network_acronym_str ES
network_name_str España
repository_id_str
spelling Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodesOrtega-San-Martín, L.Morán-Ruiz, A.Wain-Martin, A.Vidal, K.Larrañaga, A.Laguna-Bercero, M.A.Arriortua, M.I.A series of chromite perovskites with the general formula Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) has been prepared by three combustion synthesis routes using a different combustible substance each time: glycine, urea and sucrose. In order to isolate the effect of divalent dopant concentration from the A cation steric effects, the whole group has a fixed mean A cation radius, < rA> ˜ 1.22 Å and cation size disorder, s2(rA) ˜ 0.0001 Å2, but variable doping x. Their crystal structure, microstructure, electrical properties and expansion coefficients have been investigated on the basis of their possible use as anode materials for intermediate temperature solid oxide fuel cells (SOFC). Cell parameters, grain sizes, expansion coefficients and conductivities all are found to be dependent on x and the combustible substance used. The most interesting relationship is the negative dependence of the conductivity with x under H2 atmosphere: conductivity decreases with doping which is the opposite to the expected behavior for a p-type doped perovskites and has not been reported before.2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://zaguan.unizar.es/record/78248reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-76739-Rinfo:eu-repo/semantics/openAccessoai:zaguan.unizar.es:782482026-05-29T13:59:51Z
dc.title.none.fl_str_mv Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
title Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
spellingShingle Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
Ortega-San-Martín, L.
title_short Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
title_full Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
title_fullStr Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
title_full_unstemmed Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
title_sort Combustion synthesis and characterization of Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) perovskites for SOFCs anodes
dc.creator.none.fl_str_mv Ortega-San-Martín, L.
Morán-Ruiz, A.
Wain-Martin, A.
Vidal, K.
Larrañaga, A.
Laguna-Bercero, M.A.
Arriortua, M.I.
author Ortega-San-Martín, L.
author_facet Ortega-San-Martín, L.
Morán-Ruiz, A.
Wain-Martin, A.
Vidal, K.
Larrañaga, A.
Laguna-Bercero, M.A.
Arriortua, M.I.
author_role author
author2 Morán-Ruiz, A.
Wain-Martin, A.
Vidal, K.
Larrañaga, A.
Laguna-Bercero, M.A.
Arriortua, M.I.
author2_role author
author
author
author
author
author
description A series of chromite perovskites with the general formula Ln1-xMxCr0.9Ni0.1O3 (Ln = La and/or Nd; M = Sr and/or Ca; x = 0.25) has been prepared by three combustion synthesis routes using a different combustible substance each time: glycine, urea and sucrose. In order to isolate the effect of divalent dopant concentration from the A cation steric effects, the whole group has a fixed mean A cation radius, < rA> ˜ 1.22 Å and cation size disorder, s2(rA) ˜ 0.0001 Å2, but variable doping x. Their crystal structure, microstructure, electrical properties and expansion coefficients have been investigated on the basis of their possible use as anode materials for intermediate temperature solid oxide fuel cells (SOFC). Cell parameters, grain sizes, expansion coefficients and conductivities all are found to be dependent on x and the combustible substance used. The most interesting relationship is the negative dependence of the conductivity with x under H2 atmosphere: conductivity decreases with doping which is the opposite to the expected behavior for a p-type doped perovskites and has not been reported before.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/78248
url http://zaguan.unizar.es/record/78248
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-76739-R
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869418232666914816
score 15.300719

Similares en LA Referencia