Patent ID: 6348179
Filing Date: 2002-02-19
Classification: B82Y,C01B,C01P

Abstract:
A method for forming spherically shaped BNxOy precursor particles comprising the steps of:a) dissolving a boron compound into an aqueous solution, b) forming aerosol droplets from said boron containing aqueous solution; c) combining said aerosol droplets with an inert carrier gas to form a combined gas stream of said inert carrier gas and said aerosol droplets at a predetermined flow rate; d) feeding said combined gas stream at said predetermined flow rate into a furnace, e) maintaining the temperature in said furnace at a temperature of 600Â° C. to about 1500Â° C.; and f) injecting a gaseous nitriding agent into said furnace simultaneously with the injection of the combined aerosol gas stream whereby substantially spherically shaped BNxOy precursor particles are formed in said furnace.