Structural, thermal, dielectric studies on sol-gel derived MgO from non-alkoxide route

摘要

Mg oxide powder has been synthesised by sol-gel process via a novel non-alkoxide route. The precursor Mg oxalate gel was characterised by morphology, pore size distribution and differential thermal analysis, Fourier transformation infrared, TEM, SEM and X-ray diffraction analysis. The TEM studies on this system are reported for the first time depicting a unique morphology. A comparison in the morphology and the dielectric constant values of the sol-gel derived MgO powder was carried out with MgO powder obtained by Mg ribbon oxidation process. The sol-gel derived MgO powder was characterised by dielectric constant measurement in the compacted form and it was observed to exhibit a dielectric constant value, quite matching with the polycrystalline MgO in thin film form.