Abstract
BaTiO 3 nanocrystals were synthesized by the stearic acid gel method using stearic acid, barium stearate and tetrabutyl titanate as raw materials; the synthesis temperature was 650 °C and the formation temperature of the perovskite oxide was 950 °C by the conventional solid phase reaction method. Transformations of the precursors to gel and the gel to the crystalline phase were characterized by infrared spectroscopy, differential thermal analysis and thermogravimetric analysis. The nanocrystalline BaTiO 3 samples were characterized by transmission electron microscopy and X-ray diffraction, and further analyzed by optical emission spectroscopy and X-ray fluorescence techniques to determine impurity contents and Ba:Ti ratios. Using this synthesis method, smaller, uniform-size and high purity BaTiO 3 nanocrystals could be obtained.
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