Claims
- 1. A non-amalgamated zinc alloy powder for use in an alkaline cell, which consists of 0.01 to 0.5% by weight of bismuth, 0.01 to 0.5% by weight of indium, not less than 0.005% by weight to less than 0.01% by weight of calcium, containing 1 ppm or less of iron, the balance being zinc.
- 2. A non-amalgamated zinc alloy powder for use in an alkaline cell, which consists of not less than 0.005% by weight to less than 0.01% by weight of calcium, 0.01 to 0.5% by weight of bismuth, 0 to 0.5% by weight of aluminium, containing 1 ppm or less of iron, the balance being zinc.
- 3. A non-amalgamated zinc alloy powder for use in an alkaline cell, which consists of 0.01 to 0.5% by weight of lead, 0.01 to 0.5% by weight of indium, 0 to less than 0.01% by weight of calcium, 0.01 to 0.5% by weight of aluminium, containing 1 ppm or less of iron, the balance being zinc.
- 4. The method to produce a non-amalgamated zinc alloy powder for use in an alkaline cell, having an iron content of not more than 1 ppm as an inevitably accidental impurity, which consists of melting an electrolytic deposit zinc obtained by electrolysis and containing iron in an amount of 1 ppm or less, together with elements in such amounts in one of the following compositions (1) to (3),
- (1) 0.01 to 0.5% by weight of bismuth, 0.01 to 0.5% by weight of indium and not less than 0.005% by weight to less than 0.01% by weight of calcium,
- (2) not less than 0.005% by weight to less than 0.01% by weight of calcium, 0.01 to 0.5% by weight of bismuth, 0 to 0.5% by weight of aluminum, and
- (3) 0.01 to 0.5% by weight of lead, 0.01 to 0.5% by weight of indium, 0 to less than 0.01% by weight of calcium, 0.01 to 0.5% by weight of aluminum, and directly atomizing the formed melt.
- 5. The method to produce a non-amalgamated zinc alloy powder for use in an alkaline cell according to claim 4, wherein the melting and the atomization are conducted in an atmosphere having an iron content of 0.009 mg/m.sup.3 or less.
- 6. The method to produce a non-amalgamated zinc alloy powder for use in an alkaline cell according to claim 4, wherein the atomized powder is magnetically separated.
- 7. The method to produce a non-amalgamated zinc alloy powder for use in an alkaline cell according to claim 5, wherein the atomized powder is magnetically separated.
- 8. The alkaline cell comprising the non-amalgamated zinc alloy powder according to claim 1 as an anode active material.
- 9. The alkaline cell comprising the non-amalgamated zinc alloy powder according to claim 2 as an anode active material.
- 10. The alkaline cell comprising the non-amalgamated zinc alloy powder according to claim 3 as an anode active material.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 701,21, filed May 16, 1991, now U.S. Pat. No. 5,108,494.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4735876 |
Miura et al. |
Apr 1988 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
61-77259 |
Apr 1986 |
JPX |
61-153950 |
Jul 1986 |
JPX |
3-22356 |
Jan 1991 |
JPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
701215 |
May 1991 |
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