High dielectric constant and low loss microwave dielectric ceramics of (1 ? y)(Mg0.95Co0.05)2(Ti0.95Sn0.05)O4–y(Ca0.61Nd0.8/3)TiO3 for microwave applications

摘要

High-quality (1 ? y )(Mg_0.95Co_0.05)₂(Ti_0.95Sn_0.05)O₄– y (Ca_0.61Nd_0.8/3)TiO₃ ceramics were prepared by solid-state reaction. The products were characterized by scanning electron microscopy, X-ray diffraction, and network analyzer. (Mg_0.95Co_0.05)₂(Ti_0.95Sn_0.05)O₄ (MCTS) has a dielectric constant (ε _r ) of ～14.7, a high quality factor (Q×f) of ～330, 134 GHz, and a temperature coefficient of resonant frequency (τ _f ) of ～ ?46 ppm/°C. 0.48 MCTS ?0.52CNT has an excellent combination of microwave dielectric properties: ε _r ～ 28.58, Q × f ～ 208027 GHz (at 9 GHz), and τ _f ～ ?4.38 ppm/°C sinter at 1325°C, and can be utilized in the fabrication of microwave devices. Therefore, a band-pass filter is designed and simulated using the proposed dielectric to study its performance.