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Preparation of Nanocrystalline Strontium Titanate by the Sol-Gel Process

CHEN Zhenliang,WAN Zhengcun,SHEN Chengmin,JIA Yongzhong,YANG Jinxian Qinghai Institute of Salt Lakes,Chinese Academy of Science,Xining,810008,China  
Strontium titanate powers were prepared from Sr(AC) 2-Ti(OC 4H 9) 4-H 2O-iso C 3H 7OH systems by the sol-gel method.The results of DTA and XRD showed that prepared gels began to transform into the strontium titanates with cubic phase by a heat treatment at 500℃ and the reaction was completed proximately at 800℃.The particle sizes were determined to be from 47.1nm to 49.7nm using Scherrer's formula.The results of XRD and FT-IR indicated that strontium ion and acetate were homogeneously distributed in the gel matrix.The factors affecting the formation of gels,such as reactants and solvents,were studied.The strontium titanate gels and the titanate powers were characterized by differential thermal analysis (DTA),thermal gravimetry (TG),differential thermal gravimetry (DTG),X-ray diffraction (XRD),Fourier transform infrared spectra (FT-IR), transmission electron microscopy (TEM).
【Fund】: 青海省专家基金
【CateGory Index】: TB383
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