Zinc alloy powder as anode material for use in alkaline manganese cells and process for producing the same

摘要

Metallic zinc melted to a purity of 99.995% or higher was treated with selected elements that were dissolved in amounts within specified ranges and the resulting melts were atomized to prepare zinc alloy powders of 35 - 200 mesh; the powders were gelled with a gelling agent (sodium polyacrylate) and an electrolyte; bismuth compounds having specified powder characteristics (either an average particle size of no more than 10 mu m or a specific surface area of at least 1 m<2>/g or both characteristics) were added in specified amounts to the gels, thereby producing gels of anode. The zinc powders are composed of purified zinc alloyed with one or more elements selected from 0.001 - 0.01 wt-% of Al, 0.001 - 0.05 wt-% of Bi, 0.01 - 0.1 wt-% of In and 0.01 - 1.0 wt-% of Pb. Also disclosed is a zinc alloy powder for an anode material in alkaline manganese cells consisting of purified zinc alloyed with 0.001 - 0.01 wt-% of Al, 0.001 - 0.05 wt-% of Bi, 0.01 - 0,1 wt-% of In and 0.01 - 1.0 wt-% of Pb.