Abstract
BaTiO 3 nanoparticles were sonochemically synthesized in ethanol–water mixture solution at low temperature. Different growth mechanisms of the BaTiO 3 particles were identified in aqueous solution and ethanol–water solution under ultrasonication. Nanocrystals firstly formed and then oriented aggregated into large particles in aqueous solution under ultrasonic irradiation. Compared to the synthesis in aqueous solution, the BaTiO 3 nanoparticles could be prepared at low temperature in ethanol–water solution. Furthermore, the oriented aggregation of BaTiO 3 nanocrystals was suppressed and the BaTiO 3 nanoparticles grew up from the Ti-based precursor through a dissolution–precipitation process.
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