Microstructures and microwave dielectric properties of Ba4LiNb3O12-BaWO4 composite ceramics

► The composite ceramics consisted of hexagonal Ba4LiNb3O12 and tetragonal BaWO4. ► They had low sintering temperatures and excellent microwave dielectric properties. ► The ceramic of x = 0.69 sintered at 1070 °C had Q × f value of 75,500 GHz and τf of +8.7 ppm/°C.