Powder containing elongated grains and the use thereof for...

Details Powder containing elongated grains and the use thereof for... Powder containing elongated grains and the use thereof for...

H - Electricity

01

M

H01M 4/86 (2006.01) H01M 4/02 (2006.01) H01M 4/88 (2006.01) H01M 4/90 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2699615

The invention relates to a powder made of a set of grains, characterised in that the percentile 10 of the cumulated granulometric distribution of the grain sizes, expressed from fines, D10, is higher than or equal to 4 µm, at least 40 number % of the grains having a shape factor R between the length and the width higher than 1.5. preferably, the grains consist of a material selected from ceramics, cermets and mixtures of same. The powder according to the invention is used to produce a porous material, especially for producing solid oxide fuel cell elements (SOFC)1, especially an electrode of such a cell.

La présente invention se rapporte à une poudre constituée par un ensemble de grains, caractérisée en ce que le percentile de la répartition granulométrique cumulée des tailles de grains, exprimée à partir des fines, D10 est supérieur ou égal à 4 µm, au moins 40% en nombre des grains présentant un facteur de forme R entre la longueur et la largeur supérieur à 1,5. De préférence, les grains sont en matériau choisi parmi les céramiques, les cermets et leurs mélanges. La poudre selon l'invention est destinée à la fabrication d1 un matériau poreux, en particulier pour fabriquer les éléments de pile à combustible à oxyde solide (SOFC)1 et notamment une électrode d'une telle pile.

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