AUTHOR=Tian Huanrong , Liu Xin , Yang Yaokang , Wu Haitao , Zhang Zhiliang 

TITLE=Crystal Structure, Infrared Spectra, and Microwave Dielectric Properties of Ce2(Zr0.94Sn0.06)3(MoO4)9 Ceramics With Low Sintering Temperature

JOURNAL=Frontiers in Materials

VOLUME=Volume 7 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.00145

DOI=10.3389/fmats.2020.00145

ISSN=2296-8016

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.