05900223 is referenced by 22 patents and cites 19 patents.

A process for the preparation of crystalline perovskite powders consisting essentially of primary particles uniform in nanometer or micrometer size and uniform and near spherical shape and of narrow size distribution, of the general formula A.sub.x (BO.sub.3).sub.y, wherein cation A is at least one metal selected from the group comprising Li.sup.+, Na.sup.+, K.sup.+, Mg.sup.2+, Ca.sup.2+, Sr.sup.2+, Ba.sup.2+ and La.sup.3+ and B in the anion (BO.sub.3) is at least one metal selected from the group consisting of Ti.sup.4+, Zr.sup.4+, Sn.sup.4+, Hf.sup.4+, Nb.sup.5+ and Ta.sup.5+, x is equal to the valence of the anion (BO.sub.3) and y is equal to the valence of cation (A), comprising contacting, under stirring, an aqueous solution (I) containing inorganic or organic salts or organometallic compounds of at least one metal A and of at least one metal B, the ratio (A)/(B) being around the stoichiometric value corresponding to the above general formula, with an aqueous basic solution (II) containing an inorganic or organic base in an amount at least above the stoichiometric amount corresponding to the above general formula, preheated to 70.degree.-100.degree. C., and performing the process at temperatures of from 70.degree. to 100.degree. C. while maintaining the reaction mixture at constant OH.sup.- concentration.

Title
Process for the synthesis of crystalline powders of perovskite compounds
Application Number
299367
Publication Number
5900223
Application Date
November 14, 1996
Publication Date
May 4, 1999
Inventor
Yie Shein Her
Postdam
NY, US
Egon Matijevic
Postdam
NY, US
Agent
Finnegan Henderson Farabow Garrett & Dunner L
Assignee
Chon International
KR
IPC
C01G 23/00
C01F 13/14
C01F 17/00
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