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Effect of Zn2+ doping Li2Mg3Ti0.91(Al0.5Nb0.5)0.09O6 on structures and microwave dielectric properties

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Abstract

Li2Mg3Ti0.91(Al0.5Nb0.5)0.09O6-based microwave dielectric ceramics with high dielectric constant, quality-factor and temperature stability were prepared by conventional solid-state reaction method. Influence of Zn2+ dopant on structures and microwave dielectric properties of Li2Mg3Ti0.91(Al0.5Nb0.5)0.09O6 ceramics were investigated by X-ray diffraction and Raman spectroscopy. The X-ray diffraction results showed that no new phase was produced with the zinc addition before y = 0.08, above that some ZnTiO3 peaks with very low intensity appear in the low-angle region of the diffraction pattern. The results of the scanning electronic microscope confirmed that Zn2+ doping helped grains growth, reduced grain boundaries and made grains distribution uniform. All of these improvements have led to great dielectric constant (εr), superior quality factor (Q×f) and outstanding temperature coefficient of resonance frequency (τf). A microwave dielectric ceramic based on Li2Mg3Ti0.91(Al0.5Nb0.5)0.09O6 with optimum Zn2+ content sintered at optimum temperature, exhibiting better comprehensive dielectric properties: εr = 14.51, Q×f = 158,120 GHz, τf = −13.0 ppm/°C.

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No data was used for the research described in the article. The data that has been used is confidential. Data will be made available on request.

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Acknowledgements

The authors acknowledge the support from Suzhou Boom High Purity Materials Technology Co. Ltd and Sichuan Mianyang Weiqi Electronic Technology Co., Ltd.

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Authors and Affiliations

  1. State Key Laboratory of Environment Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, China

    Haofeng Jing, Tianchenxi Gou, Jinglian Gao, Hengheng Feng, Tao Yu & Hongtao Yu

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  1. Haofeng Jing
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Contributions

All authors contributed to the study concept and design. Material preparation, data collection and analysis were carried out by HJ, TG, JG, HF, and TY. The first draft of the manuscript was written by HJ. The study was supervised by HY. All the authors have commented on previous versions of the manuscript. Final draft read and approved by all authors.

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Correspondence to Hongtao Yu.

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Jing, H., Gou, T., Gao, J. et al. Effect of Zn2+ doping Li2Mg3Ti0.91(Al0.5Nb0.5)0.09O6 on structures and microwave dielectric properties. J Mater Sci: Mater Electron 34, 626 (2023). https://doi.org/10.1007/s10854-023-10040-6

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