Process for producing fine powdery metal

Details Process for producing fine powdery metal Process for producing fine powdery metal

1982-03-04

1983-05-17

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75 05BB, 427216, 427220, B22F 912

Patent

active

043838529

ABSTRACT:
In a generally elongated reaction tube at an elevated temperature, a reducing gas stream is caused to flow along the axis of the reaction tube and a metal-halide gas stream diluted with an inert carrier gas is caused to flow in the same direction as but at a different velocity relative to the reducing gas stream. The two gas streams contact each other in a laminar manner and form an unstable interface region therebetween wherein the metal halide gas is reduced to form fine metal particles with uniform particle size.

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patent: 2762700 (1956-09-01), Brooks
patent: 3671220 (1972-06-01), Jonsson
patent: 4140528 (1979-02-01), Hebeisen et al.
"Formation of Fine Silicon Carbide Powders by a Vapor Phase Method" Y. Okabe, J. Hojo and A. Kato, Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Journal of the Less-Common Metals, vol. 68, pp. 29-41 (1979).
"TiO.sub.2 Produced by Vapor-Phase Oxygenolysis of TiCl.sub.4 ", Y. Suyama and A. Kato, Department of Applied Chemistry, Faculty of Engineering, Kyushu University.
Journal of the American Ceramic Society, vol. 59, No. 3-4, pp. 146-149 (1976).
"Flame Structure" Chapter II, pp. 9-42, R. M. Fristrom and A. A. Westenberg, The Applied Physics Laboratory, The Johns Hopkins University, McGraw-Hill Book Company, 1965, Printed in U.S.A.
"Boundary Layer Theory" 7-th Edition, Chapter XXIV, pp. 729-757, Hermann Schlichting (translated by J. Kestin), McGraw-Hill, Inc. 1979 printed in U.S.A.

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