New material properties of xLa(Mg1/2Ti1/2)O3-(1-x) (Na0.5Nd0.5)TiO3 ceramics at microwave frequencies

Ceramics in the system xLa(Mg1/2Ti1/2)O-3-(1 - x)(Na0.5Nd0.5)TiO3 with B2O3 additions (1 wt.%) have been investigated by the conventional solid-state route. Doping with B2O3 (1 wt.%) can effectively promote the densification and the dielectric properties of xLa(Mg1/2Ti1/2)O-3-(1 - x) (Na0.5Nd0.5)TiO3 ceramics. 0.4La(Mg1/2Ti1/2)O-3-0.6(Na0.5Nd0.5)TiO3 ceramics with 1 wt.% B2O3 addition possesses a dielectric constant (epsilon(r)) of 42, a Qxf value of 33,000 GHz (at 8 GHz) and a temperature coefficient of resonant frequency (tau(f)) of 0.5 ppm/degrees C sintering at 1475 degrees C. As the content of La(Mg1/2Ti1/2)O-3 increases, the highest Qxf value of 56,000 (GHz) for x=0.8 is achieved at the sintering temperature 1500 degrees C. (C) 2010 Elsevier B.V. All rights reserved.