Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...
Patent
1994-08-31
1995-12-19
Simmons, David A.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or purifying free metal powder or producing or...
75744, 216 56, 216102, 216103, B22F 916, B22F 920
Patent
active
054765358
ABSTRACT:
A method of producing a high-purity, ultra-fine powder of a first metal, particularly silver, by forming an alloy of the first metal with a second metal, such as aluminum subjecting the alloy to a leaching agent effective to leach out the second metal, leaving a porous first metal agglomerate; mixing the porous first metal agglomerate with a fresh batch of leaching agent; disintegrating the agglomerate and applying ultrasonic oscillations to the mixture to enhance the penetration of the leaching agent into the pores of the agglomerate; removing the leaching agent, leaving the first metal; and washing and drying the first metal.
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Phipps Margery S.
Simmons David A.
Ultrafine Technologies Ltd.
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