Microwave dielectric properties of temperature stable Li2ZnxCo1−xTi3O8 ceramics

Abstract The Li 2 Zn x Co 1− x Ti 3 O 8 ( x  = 0.2–0.8) solid solution system has been synthesized by the conventional solid-state ceramic route and the effect of Zn substitution for Co on microwave dielectric properties of Li 2 CoTi 3 O 8 ceramics has also been investigated. The microwave dielectric properties of these ceramics show a linear variation between the end members for all compositions. The optimized sintering temperatures of Li 2 Zn x Co 1− x Ti 3 O 8 ceramics increase with increasing content of Zn. The specimen with x  = 0.4 sintered at 1050 °C/2 h exhibits an excellent combination of microwave dielectric properties with ɛ r  = 27.7, Q u  ×  f  = 57,100 GHz and τ f  = −1.0 ppm/°C.