Microwave properties of low-fired Li2ZnTi3O8 ceramics doped with CuO-Bi2O3-V2O5

The low-fired Li2ZnTi3O8 microwave ceramics have been prepared by the conventional solid-state ceramic route. The effect of CuO-V2O5-Bi2O3 addition on the sinterability, microstructure, and microwave dielectric properties of Li2ZnTi3O8 dielectric ceramics has been investigated. It is demonstrated that the addition of low-melting CuO-V2O5-Bi2O3 can promote the densification of ceramics through liquid-phase sintering and lower the sintering temperature of Li2ZnTi3O8 ceramics from 1150 to 875 degrees C. The dense 0.25 wt% CuO-1.5 wt% Bi2O3-(x = 1.5) wt% V2O5 doped Li2ZnTi3O8 ceramics prepared at 875 degrees C have excellent dielectric properties of epsilon(r) = 25.63, Q x f = 53,400 GHz and tau(f) = -5.27 ppm/degrees C. (C) 2013 Elsevier B. V. All rights reserved.