Patent ID: 6277169
Filing Date: 2001-08-21
Classification: B01J,B22F,B24B,B82Y,C01B,C01G,C01P,C09G,C09K,C22C,H01G,H01J,H01L,H01M,H05K,Y02E,Y02P,Y10T

Abstract:
A method for making a silver-containing particulate product involving processing of a flowing aerosol stream, the method comprising:introducing said aerosol stream into a reactor wherein said aerosol stream is a first aerosol flow including first droplets suspended in a carrier gas, with said first droplets including a silver-containing precursor material;removing in said reactor liquid from said first droplets and forming particles including silver from said silver-containing precursor;removing said aerosol stream. as a second aerosol flow including said particles, from said reactor;said first aerosol flow characterized as including greater than about 0.5 liter per hour of said first droplets at a droplet loading of greater than about 0.083 milliliters of said first droplets per liter of said carrier gas said first droplets having an average size and a size distribution such that said particles have a weight average size of from about 0.1 micron to about 4 microns with at least about 75 weight percent of said particles being smaller than about twice said average size;said reactor comprises a furnace at elevated temperature, and, in said reactor, said liquid is removed from said first droplets of said first aerosol flow by evaporation of said liquid; andresidence time of said aerosol stream in a heated zone of said reactor is shorter than about 4 seconds.