Crystal Structure, Infrared Spectra, and Microwave Dielectric Properties of Ce2(Zr0.94Sn0.06)3(MoO4)9 Ceramics With Low Sintering Temperature
Huanrong Tian, Xin Liu, Yaokang Yang, H.T. Wu, Zhiliang Zhang
Abstract
Ce2(Zr0.94Sn0.06)3(MoO4)9 (CZSM) ceramics were synthesized via a traditional solid-state method to improve Q·f value. The effects of Sn-substitution on phase composition, density, microstructure and dielectric properties as a function of sintering temperature were discussed. It was clear that XRD analysis revealed a trigonal structure formed in all sintering temperature ranges. Dense and homogeneous microstructure can be obtained in samples sintered at 750-850 °C. The complex permittivity values were obtained from infrared reflectivity spectra. The dielectric permittivity and loss were 10.92 and 3.36×10-3, respectively, which agreed well with the measured values. The complex chemical bonds of CZSM ceramics were calculated based on P-V-L theory, which can be used to analyze the relationship between material structure and dielectric properties. The optimal microwave dielectric properties of εr=10.4, quality factor Q·f=59,660 GHz (at 9.70 GHz), and τf=-7.52 ppm/°C were achieved in CZSM ceramics sintered at 800 °C.