Method for production of ceramic composition
AssigneeMitsubishi Mining & Cement Co., Ltd.
InventorsYasuyuki Ogata, Hidetsugu Ono, Seiji Yamanaka
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Abstract
A ceramic composition represented by the following general formula: Pb.sub.1-x La.sub.x (Zr.sub.y Ti.sub.1-y).sub.1-x/4 O.sub.3 wherein O<x<1, O<y<1) is produced by a method which comprises adding a mixed solution of a titanium alkoxide and a zirconium alkoxide to an aqueous solution containing lead nitrate and/or lead acetate and lanthanum nitrate and/or lanthanum acetate thereby simultaneously effecting hydrolysis of said alkoxides and coprecipitation of lanthanum components, further adding an alkaline substance to the resultant system thereby effecting substantially thorough precipitation of lead and lanthanum components, and heating the produced precipitate.
Claims8
A method for the production of a ceramic composition represented by the following general formula:
- Pb.sub.1-x La.sub.x (Zr.sub.y Ti.sub.1-y).sub.1-x/4 O.sub.3
- (wherein 0<x<1, 0<y<1), comprising the steps of adding a mixed solution of a titanium alkoxide and a zirconium alkoxide in amounts to satisfy the ratio of the general formula to an aqueous solution containing at least one of lead nitrate and lead acetate and at least one of lanthanum nitrate and lanthanum acetate in amounts to satisfy the ratio of the general formula thereby simultaneously effecting hydrolysis of said alkoxides and coprecipitation of lead and lanthanum components, further adding an alkaline substance to the resultant system to adjust pH thereby effecting substantially thorough precipitation of lead and lanthanum components, and heating the produced precipitate at a temperature of not lower than 500 degrees centigrade and not higher than the decomposition temperature of said ceramic composition.
Dependencies are inferred from the claim text.