Zinc powder or zinc alloy powder with inhomogeneous bulk...

B - Operations – Transporting – 22 – F

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B22F 1/00 (2006.01) H01M 4/24 (2006.01)

Patent

CA 2506295

The invention relates to zinc powder or zinc alloy powder having an inhomogeneous bulk density depending on the particle size, whereby the difference in bulk density measured according to ASTM B212 at a size fraction smaller 75 µm vis-à-vis a size fraction greater 150 µm is at least 0.5 g/cm3 and the mean bulk density of the powder measured according to ASTM B212 ranges from 1.8 to 4.0 g/cm3. The invention also relates to mixtures of said zinc powders or zinc alloy powders and to an alkaline battery containing said powders.

L'invention concerne des poudres de zinc ou des poudres d'alliage de zinc présentant une répartition hétérogène de la densité en vrac, dépendant de la granulométrie. Selon l'invention, la différence de densité en vrac, mesurée selon ASTM B212, de la fraction dont la granulométrie est inférieure à 75 µm, par rapport à celle de la fraction dont la granulométrie est supérieure à 150 µm, est d'au moins 0,5 g/cm?3¿, et la densité en vrac moyenne des poudres, mesurée selon ASTM B212, est de 1,8 à 4,0 g/cm?3¿. L'invention concerne également des mélanges de ces poudres de zinc ou de ces alliages de poudres de zinc, ainsi qu'une pile alcaline contenant ces poudres.

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