Dielectric properties of B2O3-doped La(Mg0.5Sn0.5)O3 ceramics at microwave frequencies

In this study, the microwave dielectric properties of La(Mg0.5Sn0.5)O3 ceramics have been investigated for application in mobile communication. B2O3 was selected as a liquid sintering aid to lower the sintering temperature of La(Mg0.5Sn0.5)O3 ceramics. It was found that the X-ray diffraction patterns of the La(Mg0.5Sn0.5)O3 ceramics exhibited no significant phase difference with 0.5 wt% at different sintering temperatures. The maximum values of the dielectric constant and the quality factor multiples resonant frequency (Q × f) can be obtained when the La(Mg0.5Sn0.5)O3 with 0.5 wt% B2O3 additive were sintered at 1500 °C for 4 h. The temperature coefficient of resonant frequency τf (−85 ppm/°C) was measured for La(Mg0.5Sn0.5)O3 ceramics with 0.5 wt% B2O3 sintered at 1500 °C for 4 h.