Effect of Temperature on Structural and Electrical Properties of Bismuth Ferrite Nanoparticles Prepared By Sol Gel Method
Bismuth ferrite nano particles were prepared by sol-gel route using solutions of iron nitrateand bismuth nitrate. The produced powder was dried at 150ºC for 2 h and then calcined at various temperatures for 2 h as well.XRD was used tostudy the structure of BiFeO3Nanoparticles, it is found that the grain size were about 12.8, 39.9 and 47.6nmas calculated usingScherrer equation for samples calcined at 450˚C, 500 ºC and 550 ºC for 2 h respectively, this explain that grain size increase with increase in temperature and XRD too showed that besides the formation of single phase BiFeO3 an impurity phase was also observed.From diagnosis of samples, we foundthat BiFeO3have rhombohedral structure. Scanning electron microscope (SEM) surface morphology study indicatedabetter homogeneity with fine grain morphology besides the formation of single phase BiFeO3 an impurity phase. Less impurity phases was found in sample calcined at 450 ˚C. Atomic force microscope (AFM) declare that it hashomogenous particle distribution and coarseness of surface with change of particles to spherical form with dimension of 1.21nm, alsoGranularity Cumulation Distribution Report for same sample found that average diameter is equal to 45.31 nm. Finally the electrical properties resultsofBiFeO3such asthe dielectric constant , tangent loss and electrical resistivity and conductivitywere studied at different applied frequencies.