Journal
JOURNAL OF ADVANCED CERAMICS
Volume 10, Issue 4, Pages 778-789Publisher
SPRINGER
DOI: 10.1007/s40145-021-0472-3
Keywords
crystal structure; Phillips-van Vechten-Levine (P-V-L) theory; microwave dielectric property; (Mg1/3Sb2/3) doping
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Funding
- National Natural Science Foundation [51972143]
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Ce-2[Zr1-x(Mg1/3Sb2/3)x](3)(MoO4)(9) ceramics were prepared by the traditional solid-state method, and a single phase was obtained at sintering temperatures ranging from 700 to 850 degrees C. The crystal structure refinement was investigated using Rietveld refinement method, and the dielectric properties of Ce-2[Zr-0.94(Mg1/3Sb2/3)(0.06)](3)(MoO4)(9) ceramics were found to be excellent. The correlations between chemical bond parameters and microwave dielectric properties were analyzed using P-V-L theory.
Ce-2[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 R (3) over barc, was detected by using X-ray diffraction at the sintering temperatures ranging from 700 to 850 degrees C. 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. Ce-2[Zr-0.94(Mg1/3Sb2/3)(0.06)](3)(MoO4)(9) ceramics with excellent dielectric properties were sintered at 725 degrees C for 6 h (epsilon(r) = 10.37, Qxf = 71,748 GHz, and tau(f) = -13.6 ppm/degrees C, epsilon(r) is the dielectric constant, Qxf is the quality factor, and tf is the temperature coefficient of resonant frequency).
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