Silver Co-firable ZnTiNb2O8 microwave dielectric ceramics with Li2O-ZnO-B2O3 glass additive

Abstract

The effects of Li2O-ZnO-B2O3 glass additive on the sintering behavior, phase formation, microstructure, and microwave dielectric properties of ZnTiNb2O8 ceramics have been investigated. The sintering temperature of ZnTiNb2O8 ceramics can be effectively reduced from 1200°C to 875°C by adding a small amount of Li2O-ZnO-B2O3 glass, while no obvious degradation of the microwave dielectric properties was induced. Typically, the 2.0 wt% Li2O-ZnO-B2O3 glass-added ceramic sintered at 875°C has better microwave dielectric properties of εr=31.8, Q × f=25,013 GHz, and τf=-62 ppm/°C. In addition, the ceramics can be co-fired well with an Ag electrode. © 2009 The American Ceramic Society.