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钛酸钡纳米粉的低温合成研究

Low Temperature Synthesis of Barium Titanate Nanopowders

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【作者】 李小兵田莳孙玉静

【Author】 Li Xiaobing, Tian Shi, Sun Yujing (Beijing University of Aeronautics and Astronautics, Beijing 100083, China)

【机构】 北京航空航天大学北京航空航天大学 北京100083北京100083北京100083

【摘要】 结合溶胶-凝胶法和水热法的优点,将溶胶处理引入水热法中,采用改进的水热法在低温条件下合成了纯钙钛矿结构钛酸钡纳米粉,并与水热法合成产物进行了适当的比较。通过XRD,TEM,X射线荧光光谱(XRF),微分扫描式量热法(DSC)以及热重分析(TGA)分析了BaTiO3粉的结构和组成,并初步探讨了溶胶处理的作用。结果表明,采用乙酰丙酮改性的钛酸四丁酯作为Ti源,可有效降低BaTiO3纳米粉的水热合成温度;与常用水热法相比,采用改进的水热法合成BaTiO3纳米粉的温度更低。溶胶处理过程有利于水热合成温度的降低。

【Abstract】 The advantages of sol-gel and hydrothermal processes were integrated, and sol treatment was introduced to the hydrothermal process enabling perovskite-typed BaTiO3 nanopowders to be synthesized at 搇ow temperatures?conditions through this modified hydrothermal process. Comparisons were made between powders synthesized of the BaTiO3 powders which were studied by XRD, TEM, XRF and DSC, and the effects of sol treatment in hydrothermal process were considered. The results show that by choosing acetylacetonate-modified tetrabutyl titanate as the Ti source, the synthesis temperature of BaTiO3 nanopowders under hydrothermal processing can be significantly decreased. Compared with BaTiO3 powders by hydrothermal process, BaTiO3 nanopowders can be synthesized at lower temperature by modified hydrothermal process. Sol treatment can improve the decreasing of hydrothermal synthesis temperature.

【基金】 国家自然科学基金资助项目(50072001)
  • 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2004年01期
  • 【分类号】TB383
  • 【被引频次】15
  • 【下载频次】601
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