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Research Article | Open Access

Crystal structure and enhanced microwave dielectric properties of the Ce2[Zr1-x(Al1/2Ta1/2)x]3(MoO4)9 ceramics at microwave frequency

Chao FENGa, Xu ZHOUa, Bingjing TAOa, Haitao WUb( ), Shifeng HUANGa( )
Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
School of Environmental and Material Engineering, Yantai University, Yantai 264005, China
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Abstract

Dense microwave dielectric ceramics of Ce2[Zr1-x(Al1/2Ta1/2)x]3(MoO4)9 (CZMAT) (x = 0.02-0.10) were prepared by the conventional solid-state route. The effects of (Al1/2Ta1/2)4+ on their microstructures, sintering behaviors, and microwave dielectric properties were systematically investigated. On the basis of the X-ray diffraction (XRD) results, all the samples were matched well with Pr2Zr3(MoO4)9 structures, which belonged to the space group R3¯c. The lattice parameters were obtained using the Rietveld refinement method. The correlations between the chemical bond parameters and microwave dielectric properties were calculated and analyzed by using the Phillips-Van Vechten-Levine (P-V-L) theory. Excellent dielectric properties of Ce2[Zr0.94(Al1/2Ta1/2)0.06]3(MoO4)9 with a relative permittivity (ɛr) of 10.46, quality factor (Q × f ) of 83,796 GHz, and temperature coefficient of resonant frequency (τf) of -11.50 ppm/℃ were achieved at 850 ℃.

Keywords

microwave dielectric ceramicsCe2[Zr1-x(Al1/2Ta1/2)x]3(MoO4)9 (CZMAT)Phillips-Van Vechten-Levine (P-V-L) theorylow sintering temperature

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Journal of Advanced Ceramics
Volume 11 Issue 3,
March 2022
Pages 392-402
DOI: 10.1007/s40145-021-0541-7
Cite this article:
FENG C, ZHOU X, TAO B, et al. Crystal structure and enhanced microwave dielectric properties of the Ce2[Zr1-x(Al1/2Ta1/2)x]3(MoO4)9 ceramics at microwave frequency. Journal of Advanced Ceramics, 2022, 11(3): 392-402. https://doi.org/10.1007/s40145-021-0541-7

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Received: 20 June 2021
Revised: 24 September 2021
Accepted: 27 September 2021
Published: 11 February 2022
© The Author(s) 2021.

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