Controlled particle size batio3

Claim 2

IN A PROCESS FOR PRODUCING PARTICLES OF BARIUM TITANATE FINER THAN ABOUT 800 ANGSTROM UNITS AS A PRECIPITATE WHEN AN ALCOHOLIC SOLUTION OF A TITANIUM ESTER IS ADDED TO AN AQUEOUS ALKALINE SOLUTION OF A WATER SOLUTION BARIUM SALT, THE IMPROVEMENT WHICH COMPRISES ADDING AN AMOUNT OF A WATER-SOLUBLE OXYGEN-FUNCTIONAL ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, KETONES AND CYCLIC ETHERS TO THE AQUEOUS SOLUTION PRIOR TO THE ADDITION OF THE ALCOHOLIC SOLUTION OF A TITANIUM ESTER, SAID AMOUNT COMPRISING BETWEEN ABOUT 20% AND 75% BY VOLUME OF THE INITIAL SOLUTION OF THE WATER-SOLUBLE BARIUM SALT AND RECOVERING SAID PRECIPITATED PARTICLES FROM THE REMAINING LIQUID PRESENT.

Claim 3

IN A PROCESS FOR PRODUCING PARTICLES OF BARIUM TITANATE FINER THAN ABOUT 800 ANGSTROM UNITS AS A PRECIPITATE IN A REACTION MIXTURE FORMED BY ADDING AN ALCOHOLIC SOLOTION OF A TITANIUM ESTER TO AN AQUEOUS ALKALINE SOLUTION OF A WATER-SOLUBLE BARIUM SALT, THE IMPROVEMENTS WHICH COMPRISES (1) ADDING AN AMOUNT OF A WATER-SOLUBLE OXYGEN-FUNCTIONAL ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, KETONES AND CYCLIC ETHERS TO THE AQUEOUS SOLUTION PRIOR TO THE ADDITION OF THE ALCOHOLIC SOLUTION OF A TITANIUM ESTER WHEREBY THE PARTICLES WHICH ARE PRECIPITATED POSSES THE DESIRED FINENESS, THE AMOUNT BEING AT LEAST ABOUT 20% BY VOLUME OF THE AQUEOUS ALKALINE SOLUTION; AND (2) AFTER SAID PRECIPITATION IS COMPLETE, ADDING AN ADDITIONAL AMOUNT OF A WATER-SOLUBLE OXYGEN-FUNCTIONAL ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, KETONES AND CYCLIC ETHERS TO THE PRECIPITATE CONTAINING SOLUTION PREVIOUSLY FORMED, WHEREBY GRAIN GROWTH AND PEPTIZATION OF THE FINELY DIVIDED PARTICLES OF BARIUM TITANATE ARE ESSENTIALLY ARRESTED, AND THEREAFTER SEPARATELY RECOVERING THE FINE PARTICLES OF BATIO3.

Claim 4

IN A PROCESS FOR PRODUCING PARTICLES OF BARIUM TITANATE FINER THAN ABOUT 800 ANGSTROM UNITS AS A PRECIPITATE IN A REACTION MIXTURE FORMED BY ADDING AN ALCOHOLIC SOLOTION OF A TITANIUM ESTER TO AN AQUEOUS ALKALINE SOLUTION OF A WATER-SOLUBLE BARIUM SALT, THE IMPROVEMENTS WHICH COMPRISES (1) ADDING AN AMOUNT OF A WATER-SOLUBLE OXYGEN-FUNCTIONAL ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, KETONES AND CYCLIC ETHERS TO THE AQUEOUS SOLUTION PRIOR TO THE ADDITION OF THE ALCOHOLIC SOLUTION OF A TITANIUM ESTER WHEREBY THE PARTICLES WHICH ARE PRECIPITATED POSSES THE DESIRED FINENESS, THE AMOUNT BEING AT LEAST ABOUT 20% BY VOLUME OF THE AQUEOUS ALKALINE SOLUTION; AND (2) AFTER SAID PRECIPITATION IS COMPLETE, ADDING AN ADDITIONAL AMOUNT OF A WATER-SOLUBLE OXYGEN-FUNCTIONAL ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, KETONES AND CYCLIC ETHERS TO THE PRECIPITATE CONTAINING SOLUTION PREVIOUSLY FORMED, WHEREBY GRAIN GROWTH AND PEPTIZATION OF THE FINELY DIVIDED PARTICLES OF BARIUM TITANATE ARE ESSENTIALLY ARRESTED, AND THEREAFTER SEPARATELY RECOVERING THE FINE PARTICLES OF BATIO3.