Process for producing spherical metal particles
AssigneesMitsui Mining & Smelting Co., Ltd., Minerva Kiki Co., Ltd.
InventorGozo Suzuki
Life of this patent
Estimating the term…
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.
Claims10
A process for producing spherical metal particles which 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 consisting essentially of nitrogen and oxygen gases and the concentration of the oxygen ranges from 10 to 500 ppm on the basis of the weight of the composition.
A process for producing spherical metal particles which 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 consisting essentially of nitrogen gas and air and the concentration of the oxygen ranges from 10 to 500 ppm on the basis of the weight of the composition.
Dependencies are inferred from the claim text.