Method of producing high-purity ultra-fine metal powder
US5476535A · kind A · utility
20Cited by
25References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Aug 31, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.