Osram Sylvania Inc.

Scott A Braymiller

David L Houck

Michael R Pierce

Nelson E Kopatz

Thomas A Wolfe

Raj P Singh

Raj Pal Singh Gaur

An electrochemical displacement-deposition method for making composite metal powders is described. The method is carried out by combining tungsten or molybdenum metal particles with particles of silver oxide or copper oxide in an aqueous hydroxide solution. Heat is applied to the solution to cause the oxide particles to convert to silver or copper metal particles which are substantially adhered to the refractory metal particles. Unlike conventional methods, it is not necessary to heat the oxide powders to a very high temperature in a reducing atmosphere in order to form the composite metal powder.

Electrochemical displacement-deposition method for making composite metal powders

A method for spheridizing silicon metal particles is described. The method involves injecting irregular silicon metal particles into a high-temperature plasma reactor to melt at least 50 weight percent of the particles. The molten droplets are solidified to form substantially spherical silicon particles having a thin SiO coating which may be removed by treating with a weak hydroxide solution.

Method of spheridizing silicon metal powders

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Troy, PA, United States of America

Scott A Braymiller