Low temperature cofirable Li2Zn3Ti4O12 microwave dielectric ceramic with Li2O–ZnO–B2O3 glass additive

Abstract

The effects of Li2O–ZnO–B2O3 (LZB) glass additive on the sintering behavior, phase composition, microstructure and microwave dielectric properties of Li2Zn3Ti4O12 ceramics were investigated. The addition of a small amount of LZB glass can reduce the sintering temperature of Li2Zn3Ti4O12 ceramics from 1,075 to 900 °C without much degradation of the microwave dielectric properties. Only a single-phase Li2Zn3Ti4O12 is formed in Li2Zn3Ti4O12 ceramic with LZB addition. Typically, the 1.5 wt% LZB glass-added Li2Zn3Ti4O12 ceramic sintered at 900 °C for 2 h can reach a high relative density of 97.5 % and exhibits good microwave dielectric properties, i.e., relative dielectric constant (e r ) = 19.1, quality factor (Q) = 7083.5 at 9 GHz, and temperature coefficient of resonant frequency (τ f ) = − 48.9 ppm/°C. In addition, the ceramic could be co-fired well with an Ag electrode, which is made it as a promising dielectric ceramic for low temperature co-fired ceramics technology application.