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Detection Of Barium Ion Leaching From Barium Titanate Powder In Water By EDTA Titration

Dang-Hyok Yoon, Burtrand I.Lee

An obstacle for using a water-based processing of barium titanate (BaTiO3) powders in the electro-ceramics industry is the leaching of Ba2+ in water due to the thermodynamic instability of BaTiO3. It is demonstrated here that the amount of Ba2+ leaching from BaTiO3 in water can be determined by the EDTA titration method. In order to confirm the reliability of this method, a blank test is performed with the known amount of Ba2+ by dissolving Ba-acetate in water. The effect of some organic processing additives on EDTA titration is also examined. The results show that the EDTA titration method is quite reliable in measuring the amount of Ba2+ from BaTiO3 in water unless a precipitate is formed by the reaction between Ba2+ and organic materials added.