Methods for producing monodispersed particles of barium titanate
Abstract
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.
- Inventors:
-
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 873881
- Patent Number(s):
- 6264912
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- DOE Contract Number:
- AC05-96OR22464
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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/
Citation Formats
Hu, Zhong-Cheng. Methods for producing monodispersed particles of barium titanate. United States: N. p., 2001.
Web.
Hu, Zhong-Cheng. Methods for producing monodispersed particles of barium titanate. United States.
Hu, Zhong-Cheng. Mon .
"Methods for producing monodispersed particles of barium titanate". United States. https://www.osti.gov/servlets/purl/873881.
@article{osti_873881,
title = {Methods for producing monodispersed particles of barium titanate},
author = {Hu, Zhong-Cheng},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}