Low-temperature sintering and microwave dielectric properties of Li2ZnTi3O8 ceramics

The Li2ZnTi3O8 ceramics with MgO-B2O3-SiO2 (MBS) addictive have been prepared by the conventional solid-state ceramic route. The effects of MBS glass on the sintering temperature, microstructure and microwave dielectric properties of Li2ZnTi3O8 ceramics were investigated. The X-ray diffraction results showed that Li2ZnTi3O8 doped with MBS glass was a single-phase without forming secondary phase. It was found that the addition of MBS to the Li2ZnTi3O8 ceramics effectively lowered the sintering temperature from 1075 degrees C to 900 degrees C while maintaining good microwave dielectric properties. Especially, when the glass content was 2.0 wt%, the ceramics sintered at 900 degrees C for 4 h exhibited excellent microwave dielectric properties: epsilon(r) = 25.0, Q x f = 56,200 GHz, tau(f) = -9.9 ppm/degrees C. (C) 2013 Elsevier B.V. All rights reserved.