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Synthesis and Characterization of BaTiO_3 Nanocrystals

WANG Xiao-Hui;ZHAO Chun;WANG Zi-Chen;WU Feng-Qing;ZHAO Mu-Yu(Department of Chemistry,Jilin University,Changchun,130023)  
BaTiO3 nanocrystals were synthesized by stearic acid-gel methd(SAG) ,using stearic acid, barium stearate and tetrabutyl titanate as raw materials. The synthesis temperature was 650℃ and the formation temperature of perovskites oxide was 950℃ by conventional solid phase reaction method. The transformations of precursor compound to gel and to crystalline phase were characterized by infrared spectroscopy,differential thermal analysis and thermogravimatric analysis. The nanocrystalline BaTiO3 samples were characterized by transmission electron microscope(TEM) and X-ray diffraction. Powders were further analyzed by optical emission spectroscopy and X-ray fluorescence techniques to determine impurity contents and Ba:Ti ratios. Using this synthesis method,small size and high purity BaTiO3 nanocrystal could be obtained.
【Fund】: 国家自然科学基金,国家教育委员会博士点基金
【CateGory Index】: TB383
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