Microwave Dielectric Properties of Novel Glass-Free Low-Firing Li_2CeO_3 Ceramics

摘要

Novel glass-free low temperature firing microwave dielectric ceramics Li_2CeO_3 with high Q prepared through a conventional solid-state reaction method had been investigated. All the specimens in this paper have sintering temperature lower than 750℃. XRD studies revealed single cubic phase. The microwave dielectric properties were correlated with the sintering conditions. At 720℃/4 h, Li_2CeO_3 ceramics possessed the excellent microwave dielectric properties of ε_r = 15.8, Q × f= 143 700 (GHz), and ι_f = -123 ppm/℃. Li_2CeO_3 ceramics could be excellent candidates for glass-free low-temperature co-fired ceramics substrates.