Method for forming zinc alloy powder for use in alkaline battery

1. A method for foil ling a zinc alloy powder for use in an alkaline battery, comprising:

obtaining a zinc molten metal in which a zinc ingot is melted;

melting a zinc-aluminum master alloy in the zinc molten metal, thereby obtaining an aluminum-contained zinc alloy molten metal; and

producing an aluminum-contained zinc alloy powder by powdering the aluminum-contained zinc alloy molten metal wherein

the zinc-aluminum master alloy contains 1-18% aluminum by mass, and

a melting point of the zinc-aluminum master alloy is lower than a melting point of the zinc, and density of the zinc-aluminum master alloy is greater than density of the aluminum.

2. The method of claim 1 , wherein the zinc-aluminum master alloy contains 1-10% aluminum by mass.

3. The method of claim 1 , wherein the zinc-aluminum master alloy contains 4-8% aluminum by mass.

4. The method of claim 1 , wherein the zinc alloy powder contains 0.001-0.05% aluminum by mass.

5. The method of claim 1 , wherein the zinc alloy powder contains 0.002-0.009% aluminum by mass.