T.KAVITHA^*, A.RAJENDRAN^**, A.DURAIRAJAN ^***, A.NEDUNCHEZHIAN^***,

*Research scholar, Department of Physics, Nehru Memorial College, Puthanampatti, Tiruchirappalli District, TamilNadu-621 007, INDIA.

**Professor, Department of Physics, Nehru Memorial College, Puthanampatti, Tiruchirappalli District, TamilNadu-621 007, INDIA.

***Department of Mechanical Engineering, KSR College of Engineering, Tiruchengode, TamilNadu-637 215, INDIA.

A series of Titania nanoparticles has been synthesized via sol- gel  method using titanium tetraisopropoxide as a precursor. The structure and morphology of Nano TiO₂ are characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The effect of calcinations temperature on phase transformation of nano TiO₂ ( Anatase) is determined by XRD. The grain size of nano TiO₂ particle are found to be 8-14 nm. The thermal stability is analyzed by TG-DTA. Nano TiO₂  is stable upto 400⁰C by controlling the acidity and the molar ratio of starting materials. 

Key words: Titania, sol- gel, Anatase, X-ray diffraction, SEM.