PREPARATION OF STOICHIOMETRIC FINE LEAD BARIUM-TITANATE POWDER

Lead barium titanate powder with 0.03-0.15 mum particle sizes was prepared from lead barium titanyl oxalate which was previously prepared by reacting high-purity ammonium titanyl oxalate with barium and lead acetate. The critical factor in preparing the barium titanyl oxalate was the reaction time. It was necessary to allow 2-4 h to synthesize the oxalate to get a single-phase barium titanate. The critical factors in preparing the lead titanyl oxalate were pH and the concentration of the solution. It was necessary to adjust the pH to around 0.5 and the concentration to <0.08M. When lead barium titanyl oxalate is prepared, low pH, low concentration, and a long reaction time are necessary.