Modified titania and titanium-containing composites as fillers exhibiting an electrorheological effect

作者：Murashkevich A N^*; Alisienok O A; Zharskii I M; Korobko E V

来源：Inorganic Materials, 2013, 49(2): 165-171.

DOI：10.1134/S0020168513020209

SiO2/TiO2 nanocomposites and individual titania (S = 30-500 m(2)/g) have been prepared through cohydrolysis of organomineral silicon and titanium derivatives in the presence of templates. We demonstrate that heterovalent substitution of chromium or cerium for titanium increases the thermal stability of TiO2 in terms of its crystallite size and specific surface area. After drying at 120A degrees C, fillers based on SiO2/TiO2 composites (coprecipitated and core-shell SiO2/TiO2 particles) exhibit a significant electrorheological response due to appreciable hydrate and hydroxyl layers on the surface of the particles. Structural modification of titania also allows one to increase the electrorheological effect through an increase in specific surface and defect formation. DOI: 10.1134/S0020168513020209

• 出版日期2013-2