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Title: Apparatus for producing nanoscale ceramic powders

Patent ·
OSTI ID:870053
 [1];  [2];  [3]
  1. Andover, MA
  2. Windham, NH
  3. Little Compton, RI
+ Show Author Affiliations

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.

Assignee:
Physical Sciences, Inc. (Andover, MA)
Patent Number(s):
US 5447708
Application Number:
08/061,069
OSTI ID:
870053
Country of Publication:
United States
Language:
English

References (15)

Ultrafine BaPb1-xBixO3 powders prepared by the spray-ICP technique journal June 1987
Production of ultrafine metal oxide aerosol particles by thermal decomposition of metal alkoxide vapors journal December 1986
Synthesis, characterization, and properties of nanophase TiO 2 journal December 1988
Research opportunities on clusters and cluster-assembled materials—A Department of Energy, Council on Materials Science Panel Report journal June 1989
Aggregation and growth of submicron oxide particles in flames journal May 1982
Basic research needs on high temperature ceramics for energy applications journal June 1980
Production of Monodispersed Colloidal Particles journal August 1985
Effects of solute ion and grain size on superplasticity of ZrO2 polycrystals journal January 1991
Overview Of Fiber Optic Research At Brown University conference February 1990
Synthesis of Solid, Spherical Zirconia Particles by Spray Pyrolysis journal January 1990
Experimental control of ultrafine TiO2 particle generation from thermal decomposition of titanium tetraisopropoxide vapor journal January 1989
Nanometer Oxide Ceramic Particles With Controlled Agglomeration journal March 1991
Factors determining the primary particle size of flame-generated inorganic aerosols journal March 1989
Aerosol flow reactor production of fine Y 1 Ba 2 Cu 3 O 7 powder: Fabrication of superconducting ceramics journal May 1988
Laser Synthesis of Si/C/N Powders from 1,1,1,3,3,3-Hexamethyldisilazane journal August 1986

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Related Subjects

apparatus
producing
nanoscale
ceramic
powders
provides
temperature
residence
time
conditions
production
confinement
structure
multiple
inclined
surfaces
confining
flame
located
define
zone
burner
employs
burners
provide
close
proximity
delivery
disposed
adjacent
delivers
aerosol
comprising
organic
carbonaceous
carrier
material
precursor
expose
sufficient
induce
combustion
vaporization
nucleation
diffusion
oxidation
form
pure
crystalline
narrow
size
distribution
nanophase
particles
narrow size
inclined surface
inclined surfaces
ceramic powder
apparatus provides
ceramic powders
size distribution
residence time
disposed adjacent
ceramic particles
close proximity
temperature sufficient
ceramic precursor
carrier material
ceramic particle
nanoscale ceramic
phase ceramic
multiple inclined
nanophase ceramic
time conditions
producing nanoscale
confinement structure
/423/501/