Effect of reaction time on particle size and dielectric properties of manganese substituted CoFe2O4 nanoparticles

An auto-combustion route was adopted for preparing nanosize manganese substituted cobalt ferrite. The synthesis of the nanoparticles was carried out using different fuel ratio for combustion process. The prepared samples were characterized using XRD and TEM. The impact of fuel ratio on the formation of Co0.6Mn0.4Fe2O4 nanoparticles was analyzed in terms of particle size. The particle is achieved towards smaller range of size as ∼3–51 nm only at the 50% fuel ratio. The 75% and 100% fuel combustion ratio are not supported to attain the particle size on these ranges. The dielectric loss and low value of dielectric constant have been measured in the frequency range of 50 Hz–1 MHz.

► The higher combustion reaction time supports to achieve less particle size. ► The low value of dielectric loss is obtained by the influence of Manganese. ► Nature of the ferrites was affected with increasing annealing temperature.