Enhanced the temperature stability of low-fired Li3Mg2NbO6 microwave dielectric ceramics for LTCC application

The temperature stability of low-fired (1− x )Li 3 Mg 2 NbO 6 - x La 0.5 Na 0.5 TiO 3 -6wt% LiF ceramics ( x = 0.025, 0.050, 0.075, 0.100) were fabricated in an effort to develop a low-temperature co-fired microwave communication material. The sintered samples had a primary phase of Li 3 Mg 2 NbO 6 and a secondary phase of La 0.5 Na 0.5 TiO 3 . The addition of La 0.5 Na 0.5 TiO 3 additive significantly enhances the dielectric properties of Li 3 Mg 2 NbO 6 ceramics. After sintering at 925 °C for 6 h, 0.95Li 3 Mg 2 NbO 6 -0.05La 0.5 Na 0.5 TiO 3 -6wt% LiF ceramics showed a dielectric performance: the ε r value of 14.9, Q × f of 51,888 GHz, and the τ f value of − 4.77 ppm/°C. The samples displayed well compatibility with the silver electrodes. It is promised to become a new material in microwave communication and has potential applications in low-temperature co-firing ceramics (LTCC).