Low-fired Li₃Mg₂NbO₆ microwave dielectric ceramics by adding LMBCS glass for LTCC application

Low temperature co-fired ceramics (LTCC) technology is extensively utilized to meet the requirements of device integration and miniaturization. Low-fired Li₃Mg₂NbO₆ ceramics doped with xwt% Li₂O–MgO–B₂O₃–CaF₂–SiO₂ glass (LMBCS, x = 0.5, 1.0, 1.5, 2.0) were prepared by the solid-state reaction method for applications in microwave communication materials. All samples exhibited a single-phase Li₃Mg₂NbO₆ structure. The addition of LMBCS glass effectively reduced the sintering temperature of Li₃Mg₂NbO₆ ceramics from 1250 °C to 875 °C. And adding LMBCS glass improved the Q × f value of Li₃Mg₂NbO₆ ceramics. The Li₃Mg₂NbO₆-1.0wt% LMBCS ceramics exhibited outstanding microwave dielectric properties: ε_r = 16.8, Q × f = 89,495 GHz, τ_f = − 27.4 ppm/°C at 875 °C, which indicates that this ceramic is potential candidate materials for LTCC.