Method of preparing ceramic powders
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United States of America Patent
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Oct 7, 2014
Grant Date -
Nov 11, 2010
app pub date -
May 10, 2010
filing date -
Aug 2, 2006
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Abstract
A method of forming composition-modified barium titanate ceramic particulate includes mixing a plurality of precursor materials and a precipitant solution to form an aqueous suspension. The plurality of precursors include barium nitrate, titanium chelate, and a metal or oxometal chelate. The precipitant solution includes tetraalkylammonium hydroxide and tetraalkylammonium oxalate. The method further includes treating the aqueous suspension at a temperature of at least 150° C. and a pressure of at least 200 psi, and separating particulate from the aqueous suspension after treating.
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