Synthesis of nanosize and sintered Mn0.3Ni0.3Zn0.4Fe2O4 ferrite and their structural and dielectric studies

Mn0.3Ni0.3Zn0.4Fe2O4 ferrite nanoparticles were synthesized by thermally initiated autocatalytic decomposition of metal fumarato-hydrazinate complex. The chemical phase analysis has been carried out by X-ray powder diffraction method. The formation of complete ferrite phase occurred when the sample was annealed at 1100 °C. The physical properties such as lattice parameter, bulk density and porosity were studied. The infra red spectra displayed two bands characteristics of spinel ferrite due to M–O stretching vibrations in tetrahedral and octahedral sites. The X-ray photoelectron and Mössbauer spectroscopy were used to study the valence and distribution of cations in tetrahedral (A) and octahedral [B] sites of the spinel. The frequency dependence of the dielectric properties such as dielectric constant, ε′, complex dielectric constant, ε″ and dielectric loss factor, tan δ, were studied at variable temperatures and reported in this paper.

Nanosize Mn0.3Ni0.3Zn0.4Fe2O4 ferrite synthesized by thermally initiated autocatalytic decomposition of metal fumarato-hydrazinate complex forms impurity free single phase at 1100 °C when sintered in air atmosphere for 5 h.Figure optionsDownload as PowerPoint slideHighlights
► Nanosize Mn0.3Ni0.3Zn0.4Fe2O4 was obtained by decomposition of fumarato-hydrazinate complex.
► Formation of single phase Mn0.3Ni0.3Zn0.4Fe2O4 occurs at 1100 °C.
► Transfer of Mn2+ and Zn2+ ions was observed from octahedral to tetrahedral sites after sintering.
► The dielectric constant and dielectric loss is found to be higher for ‘as synthesized’ ferrite.