Size-controlled synthesis of nanocrystalline BaTiO3 by a sol-gel type hydrolysis in microemulsion-provided nanoreactors

被引:78
作者
Beck, C [1 ]
Hartl, W [1 ]
Hempelmann, R [1 ]
机构
[1] Univ Saarbrucken, D-66123 Saarbrucken, Germany
关键词
D O I
10.1557/JMR.1998.0431
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Using the hydrolysis of appropriate alkoxide mixtures in water-in-oil microemulsions, nanocrystalline BaTiO3 has been prepared in the form of nonaggregated, cube-shaped crystals at room temperature without any sintering process as is demonstrated by means of x-ray diffractograms and transmission electron micrographs. By variation of the length of the hydrophilic part of the surfactant molecules, the diameter of the water droplets in the microemulsions could be tuned to values between 8 and 55 nm as determined by dynamic Light scattering. The size of the resulting nano-BaTiO3 (6 nm less than or equal to [d](vol) less than or equal to 17 nm) was evaluated from the line broadening of x-ray reflections and correlates to the droplet size. The particle size distribution is very narrow, and in some cases nearly monodisperse.
引用
收藏
页码:3174 / 3180
页数:7
相关论文
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