Low dielectric loss characteristics of [(Mg1-xZnx)0.95Co0.05]1.02TiO3.02 ceramics at microwave frequencies

Low-loss microwave dielectric materials systems of [(Mg1−xZnx)0.95Co0.05]1.02TiO3.02 ceramics were fabricated using solid-state synthesis. Partial Zn2+ and Co2+ substitutions for Mg2+ of [(Mg1−xZnx)0.95Co0.05]1.02TiO3.02 enhanced the Q × f value and allowed densification sintering at lower temperature than MgTiO3 which must be sintered around 1350–1400 °C. [(Mg0.6Zn0.4)0.95Co0.05]1.02TiO3.02 sintered at 1175 °C has an excellent microwave dielectric properties with dielectric constant of 20.1, a Q × f value of 280,000 GHz, and a τf value of −64.7 ppm/°C. (Mg0.6Zn0.4)0.95Co0.05]1.02TiO3.02 ceramic shows high potential for applications in mobile communications.