Microwave dielectric properties and chemical compatibility with silver electrode of Li2TiO3 ceramic with Li2O–ZnO–B2O3 glass additive

Abstract The effects of Li 2 O–ZnO–B 2 O 3 (LZB) glass additive on the sintering behavior, phase composition, microstructure and microwave dielectric properties of Li 2 TiO 3 (LT) ceramics have been investigated. The addition of a small amount of LZB glass can reduce the sintering temperature of LT ceramics from 1150 °C to 900 °C without obvious degradation of the microwave dielectric properties. Only a single-phase Li 2 TiO 3 is formed in LT ceramic with LZB glass addition sintered at 900 °C for 2 h. Typically, the 2.5 wt% LZB glass-added LT ceramic sintered at 900 °C for 2 h can reach a maximum relative density of 94.8% of the theoretical density and exhibits good microwave dielectric properties of e r =22.9, Q f =59,600 GHz and τ f =+23.7 ppm/°C. The XRD, SEM and EDX analyses showed that the ceramic can be co-fired well with Ag electrode, which may be applied for LTCC application.