Method of preparing a sintered iron electrode

Details Method of preparing a sintered iron electrode Method of preparing a sintered iron electrode

1980-10-15

1982-06-15

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

75221, 75222, H01M 426, H01M 452

Patent

active

043351921

ABSTRACT:
To activate metallic sintered iron electrodes, ammonium halogenides are suitable as activating means, mixed with the iron powder right from the start, if appropriate together with conductive graphite and an organic pore forming substancesuch as polyvinyl alcohol. They begin to function while still in the paste, and during drying, as well as in the early stages of the sintering process. This can be extended up to two hours at temperatures which are close below the decomposition temperature of the ammonium halogenides (300.degree.-350.degree. C.). After volatilization of the ammonium halogenide, the sintering is completed at the terminal temperature of, for example, 700.degree. C. for one hour and cooling is then performed in an H.sub.2 atmosphere down to room temperature.

REFERENCES:
patent: 1988861 (1935-01-01), Thorausch et al.
patent: 2122053 (1938-06-01), Burkhardt
patent: 2683182 (1954-07-01), Salanze
patent: 2800520 (1957-07-01), McGraw
patent: 2832813 (1958-04-01), Peters

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