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Effect of LiF on microwave dielectric properties of nonstoichiometric Mg2SiO4 derived using deep eutectic solvents

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Abstract

Nonstoichiometric Mg2SiO4 ceramics with various Mg/Si ratios and doped with LiF were fabricated via the choline chloride-malonic acid deep eutectic solvent (DES) route. The secondary phases including MgO, MgSiO3, and SiO2 were detected in the powder with an Mg/Si ratio of excess silicon after calcined at 1200 °C. The Q × f value of the as-fabricated Mg2SiO4 ceramics was improved because LiF facilitates its densification. The ceramics have excellent properties despite of the presence of secondary phases. The optimum dielectric properties (εr = 6.5, Q × f = 118,000 GHz, τf = − 54.6 ppm/°C at 15 GHz) were obtained in the ceramics with an Mg/Si ratio of 1.6 sintered at 950 °C for 3 h. These results indicate that the Mg2SiO4 ceramic prepared by DES route, which is eco-friendly and time-saving, could be a possible candidate for low temperature co-fired ceramic (LTCC) applications.

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Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, China

    Hao-jie Zhang, Qian Li, Yong-jun Gu, Li-hua Li, Jin-liang Huang & Bok-hee Kim

  2. Henan Key Laboratory of Materials Science & Processing Technology for Non-ferrous Metals, Luoyang, China

    Yong-jun Gu

  3. Collaborative Innovation Center of Nonferrous Metals, Luoyang, Henan, China

    Yong-jun Gu & Jin-liang Huang

  4. Division of Advanced Materials Engineering, Chonbuk National University, Chonju, Korea

    Bok-hee Kim

Authors
  1. Hao-jie Zhang
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  2. Qian Li
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  4. Li-hua Li
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  5. Jin-liang Huang
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Contributions

HZ, Material preparation, Date curation and analysis, Software, Writing—original draft, Investigation; QL, Methodology, Writing- review and editing, Supervision, Resources; YG, Methodology, Writing- review and editing, Supervision; LL, Writing- review and editing; JH, Writing- review and editing; BK, Writing- review and editing.

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Correspondence to Qian Li or Yong-jun Gu.

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Zhang, Hj., Li, Q., Gu, Yj. et al. Effect of LiF on microwave dielectric properties of nonstoichiometric Mg2SiO4 derived using deep eutectic solvents. J Mater Sci: Mater Electron 34, 844 (2023). https://doi.org/10.1007/s10854-023-10151-0

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