Synthesis and electrical properties of Ln2CuO4+δ (Ln: Nd or La) mixed conductor sputter deposited coatings View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2008-01-14

AUTHORS

P. Briois, J. C. Oliveira, F. Lapostolle, F. Perry, A. Billard, A. Cavaleiro

ABSTRACT

Nd2CuO4 and La2CuO4 are potential candidates as cathode material for intermediate temperature-solid oxide fuel cells. Nd–Cu and La–Cu oxides were co-sputtered on rotating substrates from metallic La, Nd and Cu targets in the presence of a reactive argon–oxygen gas mixture. Structural and chemical features of these films have been determined by X-ray diffraction and energy-dispersive spectroscopy. Their electrical resistivity was measured using the four-point probe method. As-deposited Nd–Cu based coatings are amorphous and, after annealing, crystallise in K2NiF4+δ -type structure for Nd/Cu atomic ratio of 2, with more or less Nd2O3 or CuO, depending on whether Nd or Cu is in excess, respectively. As-deposited La–Cu based coatings are also amorphous and crystallise in La2CuO4 for La/Cu >2 or in LaCuO3±δ perovskite-type structure when Cu is in excess. The electrical measurements show a clear relation between resistivity and structure of the coatings. After annealing, crystallised neodymium-based coatings show higher resistivity than lanthanum-based ones. Finally, LaCuO3±δ exhibit higher resistivity than La2CuO4. More... »

PAGES

455-461

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11581-007-0200-1

DOI

http://dx.doi.org/10.1007/s11581-007-0200-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1001979013


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