Patent ID: 6866885

Claim:
A process for producing a plurality of metal oxide interactant coated three dimensional particle substrates comprising: contacting said particle substrates which include external surfaces and shielded surfaces which are at least partially shielded by other portions of said substrate, as a carrier gas dispersion with a liquid droplet composition comprising a metal oxide forming compound and interactant forming compound reactant mixture having a film of said liquid droplets associated with at least a portion of the surfaces of said substrate, contacting said reaction mixture at fast reaction oxidizing and elevated temperature conditions in a reaction zone in the presence of an oxidizing agent effective to form a metal oxide coating on at least a portion of the surfaces of said substrates including at least a portion of the shielded surfaces of said substrate at said conditions without substantially adversely effecting the solid integrity of the substrate; said fast reaction oxidizing conditions in said zone including an average particle residence time of less than about one second when at fast reaction oxidizing elevated temperature conditions, which temperature is maintained by a thermal source which does not substantially adversely contribute deleterious contaminants to the metal oxide coating and recovering a plurality of metal oxide coated three dimensional particle substrates.