Effect of sintering temperature on microstructures and microwave dielectric properties of Ba2MgWO6 ceramics

The microwave dielectric properties of Ba2MgWO6 ceramics were investigated with a view to the use of such ceramics in mobile communication. Ba2MgWO6 ceramics were prepared using the conventional solid-state method with various sintering temperatures. Dielectric constants (ɛr) of 16.8–18.2 and unloaded quality factor (Qu × f) of 7000–118,200 GHz were obtained at sintering temperatures in the range 1450–1650 °C for 2 h. A maximum apparent density of 6.76 g/cm3 was obtained for Ba2MgWO6 ceramic, sintered at 1650 °C for 2 h. A dielectric constant (ɛr) of 18.4, an unloaded quality factor (Qu × f) of 118,200 GHz, and a temperature coefficient of resonant frequency (τf) of −34 ppm/°C were obtained when Ba2MgWO6 ceramics were sintered at 1650 °C for 2 h.