Abstract
A submicrometer-sized commercial BaTiO3 (BT) powder was aged in water under three different conditions: pH, aging times, and pre-heat treatments of the powder. The amount of Ba2+ ions leaching from the BT particles was determined by the EDTA titration method. As predicted by thermodynamic calculation, the greater extent and the faster rate of Ba2+ leaching were found at the lower solution pH, leveling off at pH 8. The pre-heat treatments of the BT powder increased the amount of Ba2+ leaching when compared to the as-received one. This result was shown by the formation of soluble surface BaCO3, which was detected using FT-IR spectroscopy. It was also shown that organic passivation agents were effective reducing the Ba2+ leaching but at high solution pH.
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Yoon, DH., Lee, B.I., Badheka, P. et al. Barium ion leaching from barium titanate powder in water. Journal of Materials Science: Materials in Electronics 14, 165–169 (2003). https://doi.org/10.1023/A:1022306024907
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DOI: https://doi.org/10.1023/A:1022306024907