抄録
Barium titanate (BaTiO3) nanocubes were synthesized by solvothermal reaction. The synthesis was performed using barium hydroxide [Ba(OH)2], barium acetate [Ba(CH3COO)2], and titanium dioxide (TiO2) as starting materials, with Ba / Ti atomic ratio of 2.0 and Ti concentration of 0.04 mol / l. A mixture of ethanol, 2-methoxyethernol and water was added to the starting materials and this mixture was heated at 240°C for 18h in an autoclave. X-ray diffraction measurements confirmed the formation of BaTiO3 with a perovskite structure. The water served as an oxygen source for synthesis BaTiO3. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations revealed cube-shaped BaTiO3. In order to synthesize the small-scale BaTiO3 nanocubes, various reaction conditions such as the amount of water addition, kind of barium source, and amount of barium source were investigated. BaTiO3 nanocubes with sharp-edged corners were formed by increasing the proportion of Ba(CH3COO)2 used as a raw material for the barium source.
