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Preparation of well-defined colloidal barium titanate crystals by the controlled double-jet precipitation

Published online by Cambridge University Press:  03 March 2011

Y-S. Her ,
E. Matijevi  and
M.C. Chon
Y-S. Her
Affiliation:
Center for Advanced Materials Processing, Glarkson University, Box 5814, Potsdam, New York 13699–5814
E. Matijevi
Affiliation:
Center for Advanced Materials Processing, Glarkson University, Box 5814, Potsdam, New York 13699–5814
M.C. Chon
Affiliation:
Chon International Co., 128–27 Tangju-dong, Chongno-ku, Seoul 110–071, Korea
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Abstract

A new method for the preparation of well-defined colloidal barium titanate (BaTiO3) crystals by the controlled double-jet precipitation (CDJP) technique is described. The process is extremely fast and requires a low temperature (<100 °C). The reactants, barium and titanium salts, can be used in high concentrations and the yield is quantitative. The stoichiometry of the BaTiO3 particles can be controlled precisely and reproducibly. The effects of the composition of the reactant solutions, flow rates, reaction time, and the addition of polymers on the precipitation process were investigated. The BaTiO3 powders, produced by the CDJP technique, sinter to high density at a temperature as low as 1200 °C and exhibit a relative dielectric constant of 5000 at 20 °C, which is the highest value reported in the literature. The grain sizes of the sintered samples are small and uniform, ranging between 1 and 2 μm.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 12 , December 1995 , pp. 3106 - 3114
Copyright
Copyright © Materials Research Society 1995

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References

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