Method for producing fine silver-palladium alloy powder
US5514202A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Dec 20, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F9/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing fine silver-palladium alloy powder includes the steps of: (A) preparing separately a silver nitrate solution and a palladium nitrate solution and mixing the solutions, and then adding a neutralizing and complexing agent to the mixed solutions to adjust the pH thereof to about 2.5-3.5, whereby a first mixture containing silver and palladium ions is obtained; (B) preparing a second mixture containing a reductant and a surfactant; (C) bringing the first mixture into contact with the second mixture at a reaction temperature of 15.degree.-50.degree. C. under stirring in order to permit the silver and palladium ions to be reduced and to coprecipitate so as to form silver-palladium alloy particles; and (D) recovering the coprecipitated silver-palladium alloy particles, thereby obtaining the fine silver-palladium alloy powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.