S22. Numerical simulations of aggregation of sonochemically synthesized BaTiO_3 nanocrystals(Oral Presentation)

概要

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We have modelled the sonochemical production of BaTiO_3 nanoparticles under the experimental condition of Dang et al. Numerical simulations based on the model have revealed that only primary particle aggregate with other particles. According to Dang et al., sonochemically synthesized BaTiO_3 nanocrystals of 5 nm in diameter were attached each other with their crystal axes aligned, which is known as mesocrystal. The mean diameter of the aggregates was 100-400 nm. In the present study, electric dipole-dipole interaction model is studied for oriented attachment of BaTiO_3 nanocrystals. It is suggested that there may be electric dipole moment in the sonochemically synthesized BaTiO_3 nanocrystals, while it was reported that the dipole moment disappeared below 20 nm in diameter of BaTiO_3 nanocrystals prepared by the two-step thermal decomposition of barium titanyl oxalate and postheating treatment.
日本ソノケミストリー学会の論文
2011-10-15