Conductive material comprising at least two phases

Details Conductive material comprising at least two phases Conductive material comprising at least two phases

H - Electricity

01

M

H01M 8/12 (2006.01) C04B 35/50 (2006.01) H01B 1/08 (2006.01) H01M 4/86 (2006.01) H01M 4/90 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2427738

An electronically conducting or mixed ionic and electronically conducting non- stoich-iometric oxide, in which undesired pO2 driven volume changes of the main phase is counterbalanced by contraction/expansion of one or several secondary phase(s) or by gradual solution/dissolution of the secondary phae in/from the main phase. This principle makes it possible to achieve improved dimensional stability relatively to that of the main phase alone, whilst maintaining good transport properties or, alternatively, to improve transport properties, whilst maintaining the maximum volume change in a technological application.

L'invention concerne un oxyde non stoechiométrique conducteur d'électricité ou à la fois ionique et conducteur d'électricité, pour lequel une modification indésirable de volume de la phase principale, causée par la pO¿2?, est contrebalancée par la contraction/l'expansion d'une ou plusieurs phases secondaires, ou par la solution/dissolution progressive de la phase secondaire dans la phase principale ou à partir de cette dernière. Ce principe permet d'obtenir une meilleure stabilité dimensionnelle comparée à celle de la phase principale seule, tout en conservant de bonnes propriétés de transport ou, autrement, d'améliorer les propriétés de transport tout en conservant la modification de volume maximum dans une application technologique.

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