The procedure adopted for preparing the ferrite formation was found to be quite sensitive. The
chlorine ion concentration and the pH in the solution has played a crucial role in retaining the
initial stoichiometry of the solution in the nanoparticles. This work had the objective of
studying the nanoparticle Mn-Zn ferrite obtained by the ferrioelate precursor method. In this
process, Mn-Zn ferrite, synthesized through solutions of some specific salts led to the
formation of crystalline power (10-30nm as evident from X-ray diffraction analysis) at a
temperature of 2000C. The synthesis powders were characterized by X-ray diffractometer for
identification of the crystalline phases present, by scanning electron microscopy for
identification for their morphological structure and properties, thermogarvimetry and
differential thermal analysis for identification of the oxidation/ reduction behaviour upon
firing. The fourier transformation infrared spectroscopy (FT-IR) shows two main absorption
bands v1 and v2 in the range of 4000-500cm-1and Differential Scanning Calorimetry (DSC) of
the Mn0.4Zn0.6Fe2O4 powder at 5000C predicts the exothermic and endothermic reaction with
the change in temperature with respect to heat flow. The synthesis route is simple, energy
saving and cost effective. Details of the synthesis and characterizations of the resultant
products were given.
This paper deals with the synthesis, characterization, and some applications of Mn-Zn ferrite nanoparticles. The Mn-Zn ferrite was prepared from metallic nitrates, iron citrate and citric acid with the co-precipitation method with different pH values and it was further used to synthesis Mn-Zn ferrite with polariser i.e. H2O2 (Hydrogen peroxide). The X-ray diffraction pattern shows the single phase spinel structure of the ferrites. The effect of pH and the oxidizing agent on the electrical properties of Mn-Zn ferrite was studied. The d.c. resistivity is improved with the pH value and further improved by the addition of H2O2 (Hydrogen peroxide), which acts as a strong oxidizing agent. The dielectric constant decreases with increasing pH value; at the same time the dielectric loss also decreases. Further the decrease in dielectric properties by addition of oxidizing agent are justified by inverse proportionality between resistivity and dielectric constant.
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