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Ce2[Zr1-x(Mg1/3Sb2/3)x]3(MoO4)9 (0.02 ≤ x ≤ 0.10) ceramics were prepared by the traditional solid-state method. A single phase, belonging to the space group of R3¯c, was detected by using X-ray diffraction at the sintering temperatures ranging from 700 to 850 ℃. The microstructures of samples were examined by applying scanning electron microscopy (SEM). The crystal structure refinement of these samples was investigated in detail by performing the Rietveld refinement method. The intrinsic properties were calculated and explored via far-infrared reflectivity spectroscopy. The correlations between the chemical bond parameters and microwave dielectric properties were calculated and analyzed by Phillips-van Vechten-Levine (P-V-L) theory. Ce2[Zr0.94(Mg1/3Sb2/3)0.06]3(MoO4)9 ceramics with excellent dielectric properties were sintered at 725 ℃ for 6 h (εr = 10.37, Q×f = 71,748 GHz, and τf = -13.6 ppm/℃, εr is the dielectric constant, Q×f is the quality factor, and τf is the temperature coefficient of resonant frequency).


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Effects of (Mg1/3Sb2/3)4+ substitution on the structure and microwave dielectric properties of Ce2Zr3(MoO4)9 ceramics

Show Author's information Xu ZHOUaLintao LIUaJiajia SUNbNingkang ZHANGbHuazhang SUNbHaitao WUa( )Wenhong TAOb( )
School of Environmental and Material Engineering, Yantai University, Yantai 264005, China
School of Materials Science and Engineering, University of Jinan, Jinan 250022, China

Abstract

Ce2[Zr1-x(Mg1/3Sb2/3)x]3(MoO4)9 (0.02 ≤ x ≤ 0.10) ceramics were prepared by the traditional solid-state method. A single phase, belonging to the space group of R3¯c, was detected by using X-ray diffraction at the sintering temperatures ranging from 700 to 850 ℃. The microstructures of samples were examined by applying scanning electron microscopy (SEM). The crystal structure refinement of these samples was investigated in detail by performing the Rietveld refinement method. The intrinsic properties were calculated and explored via far-infrared reflectivity spectroscopy. The correlations between the chemical bond parameters and microwave dielectric properties were calculated and analyzed by Phillips-van Vechten-Levine (P-V-L) theory. Ce2[Zr0.94(Mg1/3Sb2/3)0.06]3(MoO4)9 ceramics with excellent dielectric properties were sintered at 725 ℃ for 6 h (εr = 10.37, Q×f = 71,748 GHz, and τf = -13.6 ppm/℃, εr is the dielectric constant, Q×f is the quality factor, and τf is the temperature coefficient of resonant frequency).

Keywords:

crystal structure, Phillips-van Vechten-Levine (P-V-L) theory, microwave dielectric property, (Mg1/3Sb2/3) doping
Received: 02 November 2020 Revised: 19 January 2021 Accepted: 06 March 2021 Published: 05 August 2021 Issue date: August 2021
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Publication history

Received: 02 November 2020
Revised: 19 January 2021
Accepted: 06 March 2021
Published: 05 August 2021
Issue date: August 2021

Copyright

© The Author(s) 2021

Acknowledgements

This work was supported by the National Natural Science Foundation (No. 51972143). The authors would like to thank the administrators in infrared beamline workstation of National Synchrotron Radiation Laboratory (NSRL) for the help in infrared measurement.

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