Influence of the sintering atmosphere in doped lanthanum chromite

Lanthanum chromite to be used as interconnector in high temperature solid oxide fuel cells (HTSOFCs) must have adequate electrical conductivity and high density to avoid the mixture of employed gases. Sr and Co doped-LaCrO(3) synthesized by combustion reaction was used to study the effect of the sin...

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Bibliographic Details
Published in:Cerâmica (São Paulo) 2013-07, Vol.59 (351), p.366-371
Main Authors: Setz, L F G, Mello-Castanho, S R H, Santacruz, I, Moreno, R, Colomer, M T
Format: Magazinearticle
Language:Portuguese
Subjects:
Atmospheres
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Summary:Lanthanum chromite to be used as interconnector in high temperature solid oxide fuel cells (HTSOFCs) must have adequate electrical conductivity and high density to avoid the mixture of employed gases. Sr and Co doped-LaCrO(3) synthesized by combustion reaction was used to study the effect of the sintering atmospheres, inert (Ar) and oxidant (air) on the sintering/densification behavior. The pellets were sintered in a dilatometer and characterized by X-ray diffraction. The sintered densities were determined by Archimedes method, and Scanning Electronic Microscopic was used for microstructure observation. The results shown that inert and oxidant atmospheres promote densification but after thermal cycles, in oxidant media, the HTSOFCs performance may be impaired.
ISSN:0366-6913