Methods for producing monodispersed particles of barium titanate

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873881

Hu, Zhong-Cheng ^[1]

---

1. 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: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• 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

Related Subjects

methods
producing
monodispersed
particles
barium
titanate
low-temperature
controlled
method
high-quality
ultrafine
nanocrystalline
microsphere
powders
pure
composite
oxide
materials
ranging
nanosized
micronsized
subject
comprises
two-stage
process
stage
produces
quality
hydrous
titania
prepared
homogeneous
precipitation
via
dielectric
tuning
alcohol-water
mixed
solutions
inorganic
salts
titanium
tetrachloride
salt
precursor
material
converts
crystalline
hydrothermal
reactions
temperature controlled
oxide materials
barium titanate
temperature control
sized particles
oxide material
precursor material
organic salt
two-stage process
dispersed particles
inorganic salt
homogeneous precipitation
/423/