Effect of amorphous fillers on low loss ceramics for advanced microwave electronics

摘要

In this paper we report the development of a low-temperature sinterable Cu2ZnNb2O8 (CZN) based composite for low-temperature cofired ceramic (LTCC). The CZN ceramics were prepared by the solid-state ceramic route. The calcination and sintering temperatures of CZN were optimized at 800 °C and 975 °C, respectively, for the best density and dielectric properties. The microwave dielectric properties of ceramic were measured by split post dielectric resonator (SPDR). The CZN sintered at 975 °C had εr = 15.2, tanδ = 0.0009 at 5.1 GHz. The sintering temperature of CZN is lowered from 975 °C to 915 °C by the addition of both LBS and LMZBS glasses. CZN mixed with 0.7 wt% LBS and sintered at 915 °C had εr = 14.8, tanδ = 0.001 at 5.1 GHz. The addition of 0.7 wt% LMZBS to CZN and sintered at 935 °C/4 h had εr = 14.6, tanδ = 0.002 at 5.1 GHz.