Process for preparing crystalline silver particles having electr

Details Process for preparing crystalline silver particles having electr Process for preparing crystalline silver particles having electr

1975-02-03

1976-02-24

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75108, 75118R, 75118P, C22B 500

Patent

active

039402614

ABSTRACT:
Processes are disclosed for preparing large crystalline silver particles having exceptionally conductive surfaces. The particles may be prepared by the reduction of a water soluble silver salt in an acidified aqueous solution by a redox reaction. Silver particles having conductive surfaces may also be prepared by treating commercial silver powder with a phenolic reducing compound such as hydroquinone dissolved in a polar solvent such as a lower alcohol.
The silver powders obtained by the processes have very low electrical contact resistance and furthermore retain this low contact resistance even though the powders are exposed to air and airborne contaminants.

REFERENCES:
patent: 3201223 (1965-08-01), Cuhra et al.
patent: 3345158 (1967-10-01), Block et al.
patent: 3390981 (1968-07-01), Hoffman
patent: 3820979 (1974-06-01), Manassen

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