Effect of Sb-site nonstoichiometry on the structure and microwave dielectric properties of Li3Mg2Sb1-xO6 ceramics

Cuijin PEI; Jingjing TAN; Yang LI; Guoguang YAO; Yanmin JIA; Zhaoyu REN; Peng LIU; Huaiwu ZHANG

doi:10.1007/s40145-020-0397-2

Journal of Advanced Ceramics 2020, 9(5): 588-594 https://doi.org/10.1007/s40145-020-0397-2

Research Article |

Open Access | Issue | Published: 11 September 2020

Effect of Sb-site nonstoichiometry on the structure and microwave dielectric properties of Li₃Mg₂Sb_1-xO₆ ceramics

Show Author's Information Hide Author's Information Cuijin PEI^{^a}, Jingjing TAN^{^a}, Yang LI^{^a}, Guoguang YAO^{^a^,^b}(

), Yanmin JIA^{^a}, Zhaoyu REN^{^b}, Peng LIU^{^c}, Huaiwu ZHANG^{^d}

aSchool of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China

bSchool of Physics, Northwest University, Xi’an 710069, China

cCollege of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China

dState Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

Keywords:

ceramics, sintering, microwave dielectric properties, antimony compounds

Cite this article:

PEI C, TAN J, LI Y, et al. Effect of Sb-site nonstoichiometry on the structure and microwave dielectric properties of Li₃Mg₂Sb_1-xO₆ ceramics. Journal of Advanced Ceramics, 2020, 9(5): 588-594. https://doi.org/10.1007/s40145-020-0397-2

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Abstract

The non-stoichiometric Li₃Mg₂Sb_1-xO₆ (0.05 ≤ x ≤ 0.125) compounds have been prepared via the mixed oxide method. The influences of Sb nonstoichiometry on the sintering behavior, microstructure, phase composition along with microwave dielectric performances for Li₃Mg₂Sb_1-xO₆ ceramics were studied. Combined with X-ray diffraction (XRD) and Raman spectra, it was confirmed that phase composition could not be affected by the Sb nonstoichiometry and almost pure phase Li₃Mg₂SbO₆ was formed in all compositions. Appropriate Sb-deficiency in Li₃Mg₂SbO₆ not only lowered its sintering temperature but also remarkably improved its Q×f value. In particular, non-stoichiometric Li₃Mg₂Sb_0.9O₆ ceramics sintered at 1250 ℃/5 h owned seldom low dielectric constant ε_r = 10.8, near-zero resonant frequency temperature coefficient τ_f = -8.0 ppm/℃, and high quality factor Q×f = 86,300 GHz (at 10.4 GHz). This study provides an alternative approach to ameliorate its dielectric performances for Li₃Mg₂SbO₆-based compounds through defect-engineering.

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Effect of Sb-site nonstoichiometry on the structure and microwave dielectric properties of Li₃Mg₂Sb_1-xO₆ ceramics

Show Author's information Hide Author's Information Cuijin PEI^{^a}, Jingjing TAN^{^a}, Yang LI^{^a}, Guoguang YAO^{^a^,^b}(

), Yanmin JIA^{^a}, Zhaoyu REN^{^b}, Peng LIU^{^c}, Huaiwu ZHANG^{^d}

aSchool of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China

bSchool of Physics, Northwest University, Xi’an 710069, China

cCollege of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China

dState Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

Abstract

Keywords: ceramics, sintering, microwave dielectric properties, antimony compounds

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Acknowledgements

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Publication history

Received: 14 January 2020

Revised: 31 May 2020

Accepted: 13 June 2020

Published: 11 September 2020

Issue date: October 2020

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Acknowledgements

The authors acknowledge the support from the National Natural Science Foundation of China (Grant No. 51402235), China Postdoctoral Science Foundation (2015M582696), Science and Technology Plan Project of Xi'an Bureau of Science and Technology (GXYD17.19), Education Department of Shaanxi Province (18JK0711), and Innovation Funds of Graduate Programs of Xi'an University of Posts and Telecommunications (CXJJLD2019020).

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