FTIR Study of Nanostructure Perovskite BaTiO₃Doped with Both Fe³⁺and Ni²⁺Ions Prepared by Sol-Gel Technique

Abstract

Pure barium titanate BaTiO3 (BT) and BT doped with two dierent transition elements Fe 3+ and Ni 2+ at 5 mol.% (BT5Fe and BT5Ni, respectively) as constant concentration in powder form have been prepared by sol gel method using barium acetate, titanium(IV) n-butoxide, iron and nickel nitrates as precursor materials. The microstructure of BT and the inuence of Fe and Ni dopants on it were investigated by X-ray diraction and Fourier transform infrared spectroscopy. X-ray diraction shows that tetragonal phase is dominant for pure BT sintered for 4 h at 800 C. Scanning electron microscopy and transmission electron microscopy were used to study surface morphology and particle size distribution for BT5Fe and BT5Ni, respectively. The presence of hydroxyl defects were veried by Fourier transform infrared spectroscopy for (BaTi1-xFexO 3-x/2 ) (BTxFe), where x = 0.005, 0.01, 0.05, and 0.07 and (BaTi1-xNixO 3-x/2 ) (BTxNi), where x = 0.005, 0.01, 0.03, 0.05, and 0.07.