Abstract
The influence of Ca0.8Sr0.2TiO3 on the microstructures and microwave dielectric properties of Nd0.96Yb0.04(Mg0.5Sn0.5)O3 ceramics were investigated by the conventional solid-state method. The X-ray diffraction peaks of (1-y)Nd0.96Yb0.04(Mg0.5Sn0.5)O3-yCa0.8Sr0.2TiO3 ceramic system shifted to higher angles as y increased. The dielectric constant increased from 19.5 to 50.6, the quality factor (Q × f) decreased from 117,300 to 49,500 GHz, and the temperature coefficient of resonant frequency (τf) increased from −61 to +57 ppm/°C as y increased from 0 to 0.7 when (1-y)Nd0.96Yb0.04(Mg0.5Sn0.5)O3-yCa0.8Sr0.2TiO3 ceramic system sintered at 1600°C for 4h. A 0.4Nd0.96Yb0.04(Mg0.5Sn0.5)O3-0.6Ca0.8Sr0.2TiO3 ceramic system that was sintered at 1600°C for 4 h had a dielectric constant of 38.2, a quality factor (Q × f) of 53,500 GHz, and a temperature coefficient of resonant frequency of −3.3 ppm/°C.
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