Influence of Fe3+ Ion Substitution on Thermal and Dielectric Properties of Titanium Dioxide

Abstract

Thermal and dielectric characteristics of Fe2O3 doped TiO2 (FDT) nanopowder is investigated. Formation of FDT was prepared using the formula [1-x] TiO2 + [x] Fe2O3 by solid state reaction method. The Surface morphology was studied using atomic force microscopy (AFM) technique; it reveals the average particle size in the range of 180 to 200nm. FT-IR analysis reveals weak transmittance bands between 1020 to 1650 cm-1 and 2800 to 3500 cm-1 which shows a gradual decrease in peak intensities with an increase of Fe concentration. Thermal stability was assessed by Thermogravimetric analysis (TGA). Results of TGA Profiles indicate that all FDT nanopowder was found to be thermally stable between 400 °C to 600 °C. The dielectric behavior of the said composite has been investigated as a function of frequency (20 Hz - 1 MHz) at room temperature and it is observed that the dielectric constant decreases with increasing frequency indicating dispersion behavior.