Effect of sintering temperature on electrical and structural properties for spinel ferrites prepared by sol-gel method

Abstract

The structural and electrical properties of the nanoparticle spinel Ferrites with the general formula Mn_xZn_1-xFe₂O₄ that are composed with a sol gel auto combustion have been analyzed by vector network analyzer (VNA), X-ray diffraction (XRD), and scanning electronic microscope (SEM). MnZnFe₂O₄ spinel Ferrites are prepared using high-purity manganese nitrate, iron nitrate, zinc nitrate, and citric acid. After being pressed at 100 M Pa by piston oil, the ferrite powder is sintered at three different sintering temperatures 900, 1000, and 1100 °C to create solid samples. The XRD pattern and SEM analysis showed that the samples are cubic spinel with an inhomogeneous grain size distribution. Several electrical parameters, such as DC resistivity, Impedance, dielectric constant with real and imaginary parts, and reactance depending on the scattering parameters, are calculated for the Mn-Zn ferrite in order to study its electrical properties. These calculations are done in the entire X-band range 8–12 GHz using a VAN.