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Apparatus for producing nanoscale ceramic powders

United States Patent

*** EXPIRED ***
February 4, 1997
View the Complete Patent at the US Patent & Trademark Office
An apparatus provides high temperature and short residence time conditions for the production of nanoscale ceramic powders. The apparatus includes a confinement structure having a multiple inclined surfaces for confining flame located between the surfaces so as to define a flame zone. A burner system employs one or more burners to provide flame to the flame zone. Each burner is located in the flame zone in close proximity to at least one of the inclined surfaces. A delivery system disposed adjacent the flame zone delivers an aerosol, comprising an organic or carbonaceous carrier material and a ceramic precursor, to the flame zone to expose the aerosol to a temperature sufficient to induce combustion of the carrier material and vaporization and nucleation, or diffusion and oxidation, of the ceramic precursor to form pure, crystalline, narrow size distribution, nanophase ceramic particles.
Helble; Joseph J. (Andover, MA), Moniz; Gary A. (Windham, NH), Morse; Theodore F. (Little Compton, RI)
Physical Sciences, Inc. (Andover, MA)
08/ 449,665
May 24, 1995
GOVERNMENT INTEREST The work described herein was supported in part by contracts with the Department of Energy and the Air Force Office of Scientific Research.