Structural and Dielectric Studies of Nanocrystalline Calcium Substituted Magnesium Titanate Synthesized Through an Auto‐Igniting Combustion Technique

Nanocrystalline calcium substituted magnesium titanate was synthesized through an auto-igniting combustion technique. The phase constitution of the powder was examined using X-ray diffraction, thermal analyses, and spectroscopic studies. The particle size of ~30 nm was obtained, and that could be sintered to 96% of the theoretic density at 1150°C/2 h. The microstructure of the sintered surface was examined using scanning electron microscopy. The quality factor (Qu × f ) of 65,110 GHz, dielectric constant (er) of 20.25, and temperature coefficient of resonant frequency (τf) of ~0 ppm/°C suggest that the sintered sample can be used for microwave applications.