Investigations on physical properties of Mg ferrite nanoparticles for microwave applications

Nanocrystalline Mg-ferrites have been synthesized by sol-gel auto combustion method using citric acid as fuel agent at different Calcination temperatures (200 degrees C, 400 degrees C, 600 degrees C, and 800 degrees C). The physical properties of nano Mg-ferrite were investigated using X-ray diffraction (XRD) analysis, scanning electron microscopy, Fourier-transform infrared spectroscopy, and LCR-Hitester for structural, surface morphology, functional groups and dielectric properties respectively. The single-phase cubic spinel structure of all the samples has been confirmed by XRD. Surface morphology studies reveal that the grains are clear with well-defined grain boundaries and also found that the average grain size is maximum at 600 degrees C calcination temperature. The dielectric studies reveal that the maximum dielectric constant is attained a value of 46 with the minimum dielectric loss at 600 degrees C calcination temperature.