Abstract
Ba[(Zn1-xMgx)1/3Nb2/3]O3(x = 0 ~ 0.9) ceramics were prepared by the traditional solid-phase reaction sintering method. In this paper, the effects of MgO doping on the shrinkage, density, phase composition, crystal structure, microstructure, and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 (BZN) ceramics were investigated. The phase constituents, crystal structure, and microstructure of the ceramics were studied by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). The results showed that Ba(Zn1/3Nb2/3)O3 as the main phase, and the secondary phase Ba5Nb4O15 was detected with high MgO content (x > 0.3). However, the appearance of secondary Ba5Nb4O15 directly led to the deterioration of the microwave dielectric properties of the samples. Ba[(Zn1–xMgx)1/3Nb2/3]O3 (x = 0.3) ceramics sintered at 1500 °C for 4 h possessed superior dielectric properties: εr = 36.31, Q × f = 111,326 GHz, τf = + 12.1 ppm/°C. Such the ceramics could be used to make dielectric resonators and stable oscillators.
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Funding
This work was supported by the Natural Science Foundation of Hunan Province (Grant Nos. 2022JJ50197, 2022JJ50190), the scientific Research Fund of Hunan Provincial Education Department (Grant No. 21B0681), the graduate scientific research innovation project of Shaoyang University (Grant No. CX2021SY049), the fund of Science and Technology on Electro-Optical Information Security control Laboratory (Grant No. 2021JCJQLB055012).
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YZ: investigation and writing—original draft; LX: editing and writing—original draft; SP: project administration, conceptualization and writing—original draft; QL: writing—editing; TY: resources and methodology; WL: writing—editing; YS: investigation.
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Zhang, Y., Xiao, L., Peng, S. et al. Crystal structure and microwave dielectric properties of Ba[(Zn1-xMgx)1/3Nb2/3]O3 ceramics. J Mater Sci: Mater Electron 33, 23116–23127 (2022). https://doi.org/10.1007/s10854-022-09077-w
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DOI: https://doi.org/10.1007/s10854-022-09077-w