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Structure and dielectric properties of low-permittivity thermal-stable NiO–MgO–GeO2 system ceramics

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Abstract

Novel Ni4Mg6Ge3O16(NMG) ceramics intermediate between olivine and spinel were synthesized using solid-state reaction method. The phase evolution, crystal structure, microstructure, and dielectric properties were also systematically characterized. The NMG ceramics show the main rhombohedral phase Ni4Mg6Ge3O16 and a small amount of NiMgO2 second phase. When the sintering temperature was increased to 1475 °C, the second phase is significantly reduced, and the NMG ceramic impart great dielectric properties parameters of εr = 7.1, Q × f = 53,245 GHz, and τf = − 38.7 ppm/°C. Moreover, the 0.55NMG-0.45TiO2 ceramic can be obtained (εr =14.78, Q × f = 40,559 GHz, τf = − 2.49 ppm/°C) with high thermal stability, reflecting that it has the potential for 5G device application.

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Funding

This work was supported by the Natural Science Foundation of China (Nos. 61761015 and 11664008) and the Natural Science Foundation of Guangxi (Nos. 2017GXNSFFA198011, 2018GXNSFFA050001, and 2017GXNSFDA198027) and High-Level Innovation Team and Outstanding Scholar Program of Guangxi Institutes.

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  1. Collaborative Innovation Centre for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Shicheng Zhou, Xi Wang, Xiuli Chen, Huanfu Zhou & You Wu

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  1. Shicheng Zhou
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by SZ and XW. The first draft of the manuscript was written by SZ, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Huanfu Zhou or You Wu.

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Zhou, S., Wang, X., Chen, X. et al. Structure and dielectric properties of low-permittivity thermal-stable NiO–MgO–GeO2 system ceramics. J Mater Sci: Mater Electron 33, 13455–13461 (2022). https://doi.org/10.1007/s10854-022-08242-5

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