English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/180541
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


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

AuthorsOrtega-San-Martín, L.; Morán-Ruiz, Aroa; Wain-Martin, A.; Vidal, Karmele; Larrañaga, Aitor; Laguna-Bercero, M. A. ; Arriortua, María Isabel
KeywordsChemical synthesis
Electrical conductivity
Issue Date2018
CitationCeramics International 44(2): 2240-2248 (2018)
AbstractA 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, σ2(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.
Publisher version (URL)https://doi.org/10.1016/j.ceramint.2017.10.182
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
combustipreprint.pdf1,28 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.