Zinc powder or zinc alloy powder with inhomogeneous bulk density for alkaline batteries

Zinc powder or zinc alloy powder has an inhomogeneous bulk density distribution depending on the particle size. The difference of the bulk density measured according to ASTM B212 at a grain size amount of less than 75 mum to the grain size amount of more than 150 mum is at least 0.5 g/cm3 and the average bulk density of the powder according to ASTM B212 is in the region of 1.8-4.0 g/cm3. An Independent claim is also included for mixtures of zinc powder or zinc alloy powder.