# US 2014/0190311 A1 · Method for forming zinc alloy powder for use in alkaline battery

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- Number: US 2014/0190311 A1
- Document ID: US20140190311A1
- Status: Published application
- Kind: A1
- Application number: 14/104,774
- Filed: 2013-12-12
- Published: 2014-07-10
- Earliest claimed: 2013-01-10
- Assignees: Panasonic Corporation
- Applicants: Panasonic Corporation
- Inventors: Kenji YAMAMOTO; Shunsuke UZUKA
- Web page: https://patentgrep.com/patent/US20140190311A1

## CPC

- H01M 4/42: Alloys based on zinc
- B22F 9/06: starting from liquid material
- B22F 9/082: {atomising using a fluid (using centrifugal force B22F9/10)}
- C22C 18/00: Alloys based on zinc
- C22C 18/04: with aluminium as the next major constituent
- B22F 2009/0888: {casting construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A method for forming a zinc alloy powder for use in an alkaline battery includes: obtaining a zinc molten metal in which zinc 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.

## Claims

### Claim 1

A method for forming a zinc alloy powder for use in an alkaline battery, comprising:
obtaining a zinc molten metal in which zinc 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.

### Claim 2 (depends on 1)

The method of claim 1, wherein the zinc-aluminum master alloy contains 1-18% aluminum by mass.

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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