Titanium substituted Manganese-Zinc ferrite (Mn0.8+x Zn0.2TixFe2-2xO4 with x=0.10) was synthesized thermo chemically by solid state method at different treating temperatures. Basically, the substitution cause a rearrangement of Fe+3 ions into the two preexisting octahedral and tetrahedral sites. The X-ray analysis confirms the formation of single phase cubic spinel structure. The lattice constant decreases slightly and porosity increases with increase in sintering temperature. They can be disrupted into smaller particles by shear forces generating mechanical stress gradients. A characteristic feature of all solid-state reactions is that they involve the formation of product phase(s) at the interfaces of the reactants. UV-VIS analysis of the sample was carried out. Tunable band gaps can be obtained by varying annealing temperatures. The optical constants of refractive index, extinction coefficient, normal-incidence reflectivity, and absorption coefficient showed systematic variation with temperature. The dispersion of refractive index was analyzed by the Wemple-DiDomenico single-oscillator model.
Keywords: Dispersion, MnZnTiFeO, Wemple-DiDomenico model, band gap energy, refractive index
