Methods for producing monodispersed particles of barium titanate
Patent
·
OSTI ID:873881
- Knoxville, TN
The present invention is a low-temperature controlled method for producing high-quality, ultrafine monodispersed nanocrystalline microsphere powders of barium titanate and other pure or composite oxide materials having particles ranging from nanosized to micronsized particles. The method of the subject invention comprises a two-stage process. The first stage produces high quality monodispersed hydrous titania microsphere particles prepared by homogeneous precipitation via dielectric tuning in alcohol-water mixed solutions of inorganic salts. Titanium tetrachloride is used as an inorganic salt precursor material. The second stage converts the pure hydrous titania microsphere particles into crystalline barium titanate microsphere powders via low-temperature, hydrothermal reactions.
- Research Organization:
- LOCKHEED MARTIN ENERGY RES COR
- DOE Contract Number:
- AC05-96OR22464
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Number(s):
- US 6264912
- OSTI ID:
- 873881
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/423/
alcohol-water
barium
barium titanate
composite
comprises
controlled
converts
crystalline
dielectric
dispersed particles
high-quality
homogeneous
homogeneous precipitation
hydrothermal
hydrous
inorganic
inorganic salt
low-temperature
material
materials
method
methods
micronsized
microsphere
mixed
monodispersed
nanocrystalline
nanosized
organic salt
oxide
oxide material
oxide materials
particles
powders
precipitation
precursor
precursor material
prepared
process
produces
producing
pure
quality
ranging
reactions
salt
salts
sized particles
solutions
stage
subject
temperature control
temperature controlled
tetrachloride
titanate
titania
titanium
tuning
two-stage
two-stage process
ultrafine
via
alcohol-water
barium
barium titanate
composite
comprises
controlled
converts
crystalline
dielectric
dispersed particles
high-quality
homogeneous
homogeneous precipitation
hydrothermal
hydrous
inorganic
inorganic salt
low-temperature
material
materials
method
methods
micronsized
microsphere
mixed
monodispersed
nanocrystalline
nanosized
organic salt
oxide
oxide material
oxide materials
particles
powders
precipitation
precursor
precursor material
prepared
process
produces
producing
pure
quality
ranging
reactions
salt
salts
sized particles
solutions
stage
subject
temperature control
temperature controlled
tetrachloride
titanate
titania
titanium
tuning
two-stage
two-stage process
ultrafine
via