Improved Quality Factor of of Nd(Mg0.5Sn0.5)O3 by Substituting Nd3+ with Ba2+ at Microwave Frequency

Abstract

The microwave dielectric properties of Nd(1-2x/3)Bax(Mg0.5Sn0.5)O3 ceramics were examined with a view to their exploitation for mobile communication. The Nd(1-2x/3)Bax(Mg0.5Sn0.5)O3 ceramics were prepared by the conventional solid-state method with various sintering temperatures. The X-ray diffraction peaks of the Nd(1-2x/3)Bax(Mg0.5Sn0.5)O3 ceramics shifted to lower angles as x increased from 0 to 0.05. The X-ray diffraction patterns of the Nd2.94/3Ba0.03(Mg0.5Sn0.5)O3 ceramics revealed no significant variation of phase with sintering temperatures. A density of 6.89 g/cm3, a dielectric constant ( ) of 19.1 and a quality factor (Q f) of 212,100 GHz and a temperature coefficient of resonant frequency of -68 ppm/OC were obtained for Nd2.94/3Ba0.03(Mg0.5Sn0.5)O3 ceramics that were sintered at 1550 OC for 4 h.