Microwave dielectric properties of Ba(Mg1/3Ta(2−2x)/3Wx/3Tix/3)O3 ceramics

The microwave dielectric properties of ceramics based on Ba(Mg1/3Ta(2−2x)/3Wx/3Tix/3)O3 is investigated as a function of x. The densification as well as dielectric properties deteriorate with increase in the substitution levels of (Ti1/3W1/3)3.33+ at (Ta2/3)3.33+ site in Ba(Mg1/3Ta2/3)O3. The τf is approaching zero between x = 0.1 and 0.15 in Ba(Mg1/3Ta(2−2x)/3Wx/3Tix/3)O3 where quality factor is reasonably good (Qu × f = 80,000–90,000 GHz). The Ba(Mg1/3Ta(2−2x)/3Wx/3Tix/3)O3 with x = 1.0 has ɛr = 15.4, τf = −25.1 ppm/°C, Qu × f = 35,400 GHz.