Browse Prior Art Database

Production of Metal Alloy Particles

IP.com Disclosure Number: IPCOM000074681D
Original Publication Date: 1971-May-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Marchese, MA: AUTHOR [+2]

Abstract

A chemical reaction apparatus is provided for producing finely divided uniform metallic particles by chemical-oxidation-reduction comprising a generally vertically disposed reactor 100 and a plurality of input rings located along the length of the reactor for inputting the reactants into the reaction apparatus in a laminar helically downward flow.

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Production of Metal Alloy Particles

A chemical reaction apparatus is provided for producing finely divided uniform metallic particles by chemical-oxidation-reduction comprising a generally vertically disposed reactor 100 and a plurality of input rings located along the length of the reactor for inputting the reactants into the reaction apparatus in a laminar helically downward flow.

A solution of cobalt sulfate, sodium citrate, and sodium hypophosphite is introduced via a first input ring 102. A second input ring 106 below the first input ring 102 is used to introduce palladium chloride and a third, bottommost input ring 110 introduces a base for controlling the pH of the chemicals. The input rings 102, 106, and 110 introduce the appropriate reactants into the substantially vertical hollow tubular reaction apparatus 100 in such a way that the reactants have a circular laminar downward flow along the inner walls of the reaction apparatus. This allows uniform mixing in nonturbulant zones resulting in metal alloy or metal particles having uniform magnetic qualities, size and composition.

In the reaction area a magnetic field may be introduced by a solenoid coil 120 connected to a voltage source 122. The reaction products finally are received in a receptacle 114 and from there go to a separator 116 removing the metallic particles that are subsequently transmitted to a rotary dryer 118.

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