Process for the preparation of silver powder

Details Process for the preparation of silver powder Process for the preparation of silver powder

1975-10-20

1977-08-02

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75118R, C22B 1104

Patent

active

040393178

ABSTRACT:
A process is disclosed for preparing silver powders with a controlled apparent density wherein an aqueous silver oxide suspension is treated with hydrogen at a temperature between 60.degree. and 115.degree. and under a partial hydrogen pressure of between 5 and 25 atmospheres. The aqueous silver oxide suspension may be additioned with one or more alkali metal, alkaline earth metal, or silver sulphides. Further the aqueous silver oxide suspension may be additioned with one or more silver salts soluble in water or made soluble by complexing with ammonia, such as ammoniacal silver sulphate, silver nitrate or ammoniacal silver nitrate.

REFERENCES:
patent: 2734821 (1956-02-01), Schaufelberger
patent: 2814564 (1957-11-01), Hayden
patent: 3694254 (1972-09-01), Blumenthal
patent: 3833351 (1974-09-01), Neskora et al.
patent: 3850612 (1974-11-01), Montino et al.

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