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Title: 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:
 [1]
  1. (Knoxville, TN)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENERGY RES COR
OSTI Identifier:
873881
Patent Number(s):
6264912
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
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 = {2001},
month = {1}
}

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