Effect of particle size on the properties of Mn-Zn-In ferrites

In the present study, we have synthesized Mn0.4Zn0.6In0.5Fe1.5O4 ferrites by the normal ceramic method and the citrate precursor method. The structural studies have been made by using an x-ray diffraction (XRD) technique and scanning electron microscopy (SEM), which confirmed the formation of a single-phase spinel structure. In the normal ceramic methods, we cannot control the particle size and porosity, whereas in precursor methods, we can control both. Using the citrate precursor method, we have simultaneously reduced the particle size and sintering temperature as compared to the normal ceramic method. There is an increase in dc resistivity, reduction in dielectric constant, electrical and magnetic losses by the citrate precursor method as compared to the normal ceramic method. The initial permeability is also reduced using the citrate precursor method as compared to the normal ceramic method. However, with sintering temperature, the initial permeability increases. These observations are explained on the basis of various models and mechanisms