Dielectric properties and crystal structure of (Mg1-xCox)2(Ti0.95Sn0.05)O4 ceramics

The prepared (Mg1-xCox)(2)(Ti0.95Sn0.05)O-4 (x = 0.01-0.009) ceramics are sintered at 1275-1425 degrees C, the needed sintering temperatures of (Mg1-xCox)(2)(Ti0.95Sn0.05)O-4 ceramics slightly increased with the increase of Co4+ content. The sintering characteristics of (Mg1-xCox)(2)(Ti0.95Sn0.05)O-4 ceramics are developed by the X-ray diffraction patterns and SEM observations to find the influence of sintering temperatures and Sn4+ content on the crystal structure and the grain growth. The influence Co4+ content and sintering temperatures on the quality values (Q x f) and the temperature coefficient of resonant frequency (tau(f) values) of (Mg1-xCox)(2)(Ti0.95Sn0.05)O-4 ceramics at microwave frequency are well developed in this study. As an optimal compose, (Mg1-xCox)(2)(Ti0.95Sn0.05)O-4 (x = 0.05) successfully demonstrated a dielectric constant of 14.70, a Q x f of 330,000GHz and a temperature coefficient of resonent frequency value of -48.18ppm/degrees C sintering at 1350 degrees C. (c) 2014 The Ceramic Society of Japan. All rights reserved.