The effect of the synthesis conditions of aluminum-modified nanosized titanium dioxide on the efficiency of its use in electrorheological dispersions

Resumo

A comparative study of the physicochemical properties of nanodispersed TiO₂ samples synthesized from TiCl₄ by the sol–gel and coprecipitation methods has shown the advantages of the former from the points of view of both the specific surface area and electrorheological response of the obtained filler in 5% electrorheological dispersions. A correlation has been revealed between the temperature of TiO₂ treatment (600–800°C) and its structure, phase state and electrorheological response. The maximum shear stress increment has been observed for dispersions of TiO₂ samples that contain 7–10 mol % Al and have been thermotreated at 700°C for 3.0–3.5 h.