Microstructural and electrochemical characterizations of an electrolyte with an apatite structure, La9Sr1Si6O26.5

The electrochemical properties of dense La9Sr1Si6O26.5 pellets were studied. High conductivity values were measured (8.8X10-3S cm-1 at 700 deg C) for this pure ionic conductor. Semipermeability measurements allowed measuring an electronic transport number of 5X10-5 at 700 deg C under air. These resu...

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Bibliographic Details
Published in:Solid state ionics 2007-08, Vol.178 (23-24), p.1337-1343
Main Authors: BRISSE, A, SAUVET, A, BARTHET, C, GEORGES, S, FOULETIER, J
Format: Article
Language:English
Subjects:
Chemical Sciences
Material chemistry
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Summary:The electrochemical properties of dense La9Sr1Si6O26.5 pellets were studied. High conductivity values were measured (8.8X10-3S cm-1 at 700 deg C) for this pure ionic conductor. Semipermeability measurements allowed measuring an electronic transport number of 5X10-5 at 700 deg C under air. These results prove that La9Sr1Si6O26.5 is a pure ionic conductor. Ageing tests of this compound during one month showed a stable behaviour of the conductivity under air and a slight decrease of it under humidified atmosphere.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2007.07.009