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Nanocrystalline TiO 2 was prepared by means of a stearic acid gel method. The product was investigated by differential thermal analysis, thermogravimetric analysis, X-ray powder diffraction and transmission electronic microscopy(TEM). The results of the dielectric properties tested indicate that the dielectric constant of anatase-form nanocrystalline TiO 2 is much higher than that of the coarse crystal. The dielectric constant of the nanocrystalline material is not related with the amplitude of an external AC field in a certain range.
Nanocrystalline TiO 2 was prepared by means of a stearic acid gel method. The product was investigated by differential thermal analysis, thermogravimetric analysis, X-ray powder diffraction and transmission electronic microscopy (TEM). The results of the dielectric properties tested that that dielectric constant of anatase-form nanocrystalline TiO 2 is much higher than that of the coarse crystal. The dielectric constant of the nanocrystalline material is not related with the amplitude of an external AC field in a certain range.