FIELD: powder metallurgy, namely processes for producing silver powder used in electrical engineering industry branches, possibly for making electrodes of chemical electric current sources, electric contacts and so on.
SUBSTANCE: method comprises steps of depositing silver chloride from solution of silver nitrate with use of water soluble chloride at temperature 20 - 50°C and pH 1 - 5; decanting mother liquor; treating suspension with solution of alkali metal hydroxide at concentration in reaction medium 12 - 200 g/l; reducing silver from suspension by means of Formalin or formate at temperature 40 - 90 c for 10 -60 min; washing out successively in hot deionized water, in ammonium solution and in cold deionized water; filtering and drying deposit of silver powder at 70 - 120°C.; sifting dried powder through sieve with mesh 250 micrometers.
EFFECT: improved electrochemical, chemical and physical properties of silver powders.
2 cl, 1 tbl, 1 ex
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