Process for producing spherical metal particles

Details Process for producing spherical metal particles Process for producing spherical metal particles

1996-07-17

1999-06-29

Ryan, Patrick

Specialized metallurgical processes, compositions for use therei

Processes

Producing solid particulate free metal directly from liquid...

75331, 75339, B22F 910

Patent

active

059171138

ABSTRACT:
A process for producing spherical metal particles comprises the step of spraying a molten metal in a chamber filled with a refrigerant gas through a centrifugal atomizer, wherein the refrigerant gas is a composition comprising nitrogen and oxygen gases or nitrogen gas and air and the concentration of the oxygen ranges from 3 to 600 ppm on the basis of the weight of the composition. The production process of the present invention permits mass-production of fluent, spherical metal particles having a smooth surface, in low cost and excellent in dispersibility in a dispersing medium, which is required when the particles are used as a component for pastes or paint and varnishes, while using a small-sized chamber.

REFERENCES:
patent: 3293333 (1966-12-01), Woosley
patent: 3752611 (1973-08-01), Reed et al.
patent: 4585601 (1986-04-01), Booz et al.
patent: 5073409 (1991-12-01), Anderson et al.

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