Microwave dielectric properties and microstructures of 0.5La(Mg1/2Ti1/2)O3-0.5CaTiO3 ceramics with B2O3 addition

La(Mg1/2Ti1/2)O-3-based ceramics are prepared with a conventional solid-state route. With 50mol% CaTiO3 addition, 0.5La(Mg1/2Ti1/2)O-3-0.5CaTiO(3) ceramics with 0.25 wt % B2O3 epsilon(r) value of similar to 42.92-43.38, Q x f values of similar to 24000 (at 7 GHz) and tau(f) values of similar to-8.9 ppm/degrees C. However, the sintering temperature remains above 1400 degrees C. Doping with B2O3 (UP to 1 wt %) can effectively promote the densification and improve the dielectric properties of 0.5La(Mg1/2Ti1/2)O-3-0.5CaTiO(3) ceramics. The effects of a B2O3 additive on the microstructures, phase formation and microwave dielectric properties of La(Mg1/2Ti1/2)O-3-CaTiO3 ceramics system are investigated. The Q x f value of B2O3-doped 0.5La(Mg1/2Ti1/2)O-3-0.5CaTiO(3) ceramics can be improved to 28000 (at 8 GHz) at 1400 degrees C due to the liquid-phase effect. The microwave dielectric properties are found to strongly correlate with the sintering temperature as well as the amount of B2O3 added.