In the present work, pure phase Bismuth Ferrite (BiFeO3) was synthesized through the solution combustion technique using acetylacetone as chelating agent and urea as fuel. The samples calcined at various temperatures were studied to understand the formation of secondary phases along with pure BiFeO3 and the effect of these secondary phases on the structure, morphology and dielectric properties of BiFeO3. Further, the crystallographic parameters were calculated using Rietveld refinement. XRD and SEM analysis reveals that at higher calcinations temperatures the secondary phases disappear (12.53% to 0.07%) and the grains become uniformly distributed over the large area. While FTIR spectra reveals that highly crystalline BiFeO3 obtained at higher temperature. Dielectric properties were found to improve in pure bismuth ferrite as compared to the samples with secondary phases.

Keywords: Combustion synthesis, X-ray diffraction, Secondary phase, Dielectric properties.