H Eslami Namin - Department of Chemical engineering, Shahid Bahonar University of Kerman. Kerman
H Hashemipur Rafsanjani
M Ranjbar

Nanocrystalline titanium dioxide has attracted much interest because of its wide variety of applications. It has three crystalline phase, rutile, anatse and brookit.[1] To prepare Nanocrystalline titanium dioxide different chemical methods have been reported in the literatures. Type of starting material is a main factor to select the synthesis method.[2,3] Precipitation method is one of the conventional methods to prepare titanium dioxide in large scale because in this methods synthesis parameters like concentration of precursor, pH, and temperature can be controlled asily.[2,3],Preparing method and heat treatment have strong effect on morphology and crystalline properties of TiO2. [3, 4]The aim of this work is to study the effect of ageing on thermal stability of prepared TiO2 during calcination at different temperatures