Process for producing metal powder having controlled particle si

Details Process for producing metal powder having controlled particle si Process for producing metal powder having controlled particle si

1990-06-01

1991-11-05

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

209 5, 209171, B22F 904

Patent

active

050628860

ABSTRACT:
Disclosed is a graded metal powder for metallic pigment, comprising a metal powder wherein the metal powder has a mean particle size of from about 2.5 to about 15.0 .mu.m, the content of particles having a particle size of not greater than 1 .mu.m is not larger than about 0.5% by volume, and the metal powder has a particle size distribution such that not smaller than 97% by volume of the particles of the metal powder fall within the range between half the mean particle size of the metal powder and double the mean particle size of the metal powder. Also is disclosed a process for producing a graded metal powder by classifying metal particles dispersed in a mineral oil containing a nonionic-anionic surfactant.

REFERENCES:
patent: 4249905 (1981-02-01), Caswell

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