首页|Sintering characteristics, crystal structure, and microwave dielectric properties of Ce2[Zr1-x(Al1/2Nb1/2)x]3(MoO4)9 ceramics
Sintering characteristics, crystal structure, and microwave dielectric properties of Ce2[Zr1-x(Al1/2Nb1/2)x]3(MoO4)9 ceramics
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NSTL
Elsevier
? 2022 Elsevier B.V.This work prepared a new type of Ce2[Zr1-x(Al1/2Nb1/2)x]3(MoO4)9 (CZ1-x(AN)xM) (x = 0.02–0.10) microwave dielectric ceramics through the solid-phase process. CZ1-x(AN)xM ceramics exhibited low dielectric constant, ultra-low dielectric loss, and near-zero resonant frequency temperature coefficient, which is suitable for 5 G technology. The effects of (Al1/2Nb1/2)4+ replacing Zr4+ on the sintering characteristics, crystal structure, and microwave dielectric properties of Ce2Zr3(MoO4)9 (CZM) ceramics were studied systematically. In this work, CZ1-x(AN)xM could form a pure crystal structure in the whole doping range according to the X-ray diffraction pattern. The crystal cell parameters of the ceramics were confirmed by Rietveld refinement analysis. Furthermore, the surface morphology of CZ1-x(AN)xM sintered at the optimum sintering temperature was studied by scanning electron microscopy. Some internal parameters of the ceramics were calculated and analyzed by employing the P-V-L theory. The theoretical loss was acquired by employing an infrared reflection spectrometer. When x was 0.04 and the sintering temperature was 850 ℃, the best properties were achieved, including εr = 10.54, Q·f = 91,476 GHz (at 9.55 GHz), and τf = ? 8.95 ppm/℃. This work studied the relationship between lattice vibration and microwave dielectric properties and discussed the influence of ion doping on microwave dielectric properties from the perspective of chemical bonds, laying a theoretical foundation for related research.
Microwave dielectric propertiesP-V-L theoryRietveld refinementTheoretical loss
Bao J.、Kimura H.、Zhang Y.、Wu H.、Wang Y.、Tao B.、Zhou Y.、Chen Y.、Yue Z.
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School of Environmental and Material Engineering Yantai University
School of Materials Science and Engineering University of Jinan
Shandong Tongfang Luying Electronic Co. Ltd
State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University
NSTL
Elsevier
