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Microwave dielectric properties of α-CaSiO3/Al2O3-Li2CO3 ceramics sintered at low temperature

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Abstract

In this paper, α-CaSiO3/Al2O3-Li2CO3 was prepared by traditional solid-state method with Li2CO3 as low-temperature sintering aid added to α-CaSiO3/Al2O3 ceramics. The effects of different Li2CO3 content on the sintering properties, microstructure, and microwave dielectric properties of α-CaSiO3/Al2O3 ceramics were studied. The phase structure, micro-morphology, and microwave dielectric properties were characterized by X-ray diffractometer, scanning electron microscope, and network analyzer. The aim of this paper is to reduce the sintering temperature and improve the microwave dielectric properties of α-CaSiO3/Al2O3 ceramics by controlling the phase structure of ceramics. The results revealed that Li2CO3 additives can not only reduce the sintering temperature from 1375 to 975 °C, but also can transfer the major phase composition from α-CaSiO3 to β-CaSiO3. The density of the microwave dielectric ceramics with 3 wt% Li2CO3 additives sintered at 975 °C can reach the optimal microwave dielectric properties with εr = 6.21, Q × f = 30,471 GHz, and τf = − 34.58 ppm/°C.

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Acknowledgements

This work was supported by the GuangXi Key Laboratory of New Energy and Building Energy Saving (19-J-21-9 and 19-J-21-31).

Funding

This work was supported by the GuangXi Key Laboratory of New Energy and Building Energy Saving (19-J-21-9 and 19-J-21-31).

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Authors and Affiliations

  1. Guangxi Key Laboratory of New Energy and Building Energy Saving, Guilin, 541004, Guangxi, People’s Republic of China

    Guangyan Liu, Pengliang Sun, Zhentao Huang, Quande Che & Yuanhao Wang

  2. College of Civil and Architecture Engineering, Guilin University of Technology, Guilin, 541004, Guangxi, People’s Republic of China

    Guangyan Liu, Pengliang Sun, Zhentao Huang, Quande Che & Yuanhao Wang

  3. School of Intelligent Manufacturing, Panzhihua University, Panzhihua, 617000, Sichuan, People’s Republic of China

    Zhisen Zhang

  4. College of Management, Beijing Union University, Beijing, 100101, People’s Republic of China

    Meijia Wang

Authors
  1. Guangyan Liu
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  2. Pengliang Sun
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  4. Zhentao Huang
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  6. Yuanhao Wang
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Contributions

GL: Conceptualization, investigation, methodology, and writing—original draft. PS: Methodology, data curation, and writing—original draft. MW: Supervision, conceptualization, and project administration. ZH: Resources and formal analysis. QC: Formal analysis, supervision, and visualization. ZZ: Formal analysis, resources, and visualization. YW: Validation, funding acquisition, and writing—review & editing.

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Correspondence to Yuanhao Wang.

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Liu, G., Sun, P., Wang, M. et al. Microwave dielectric properties of α-CaSiO3/Al2O3-Li2CO3 ceramics sintered at low temperature. J Mater Sci: Mater Electron 32, 20912–20917 (2021). https://doi.org/10.1007/s10854-021-06607-w

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  • DOI: https://doi.org/10.1007/s10854-021-06607-w

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