Far-Infrared Reflectivity Spectra and Influence of Thermally Induced Strain on QualityFactor of MgTiO3 Ceramics at Microwave Frequencies

Abstract

The influence of thermally induced strain on quality factor of MgTiO3 ceramics at microwave frequencies via far-infrared reflectivity spectra and X-ray diffraction was investigated as a function of cooling rate. As the cooling rate increased, the crystallographic strain increased and Q¡¤f value decreased, which were confirmed via X-ray diffraction and far-infrared reflectivity spectra. This result was attributed to the thermally induced strain and lattice anharmonicity.