Methods of fabricating barium titanate powders

Details Methods of fabricating barium titanate powders Methods of fabricating barium titanate powders

2007-02-27

2007-02-27

Vanoy, Timothy C. (Department: 1754)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S594160, C423S069000, C423S070000, C423S071000, C423S155000, C423S157000, C501S137000

Reexamination Certificate

active

10870463

ABSTRACT:
A method of fabricating barium titanate powders uses titanium tetrachloride and barium hydroxide as reactants in a reaction solution. The pH value of the reaction solution is adjusted to strongly alkaline range by adding potassium hydroxide. Nitrogen is charged into a reaction tank at normal pressure, and the reaction solution is heated at 80–102°. The solution is intensively stirred at constant temperature, and then subjected to a hydro-thermal reflux. Then, the solution is treated through an ion exchange resin and dried to obtain a cubic BaTiO3powders.

REFERENCES:
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patent: 7001585 (2006-02-01), Swanson
patent: 2003/0044347 (2003-03-01), Shirakawa et al.
patent: 2006/0062722 (2006-03-01), Liou
Kim et al, Preparation Of Barium Titanate By Homogeneous Precipitation, 1996, Journal of Materials Science 31, pp. 3643-3645.
Park et al, Particle Size Control Of Barium Titanate Prepared From Barium Titanyl Oxalate, 1997, J. Am. Ceram. Soc., 80, pp. 1599-1604.
Tsay et al, Effects Of Temperature And Atmosphere On The Formation Mechanism Of Barium Titanate Using The Citrate Process, 1996, J. Am. Ceram. Soc., 79, pp. 1693-1696.

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