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Effects of Cu doping on phase composition, crystal structure, and dielectric properties of CaSiO3 ceramics

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Abstract

The dielectric ceramics of Ca1−xCuxSiO3 (x = 0 − 0.025) were prepared by solid-phase reaction method. The effects of Cu doping on phase composition, crystal structure, and dielectric properties of CaSiO3 ceramics were investigated. XRD results indicated that appropriate content of Cu doping could suppress impurity phases and obtain pure α-CaSiO3 calcined powders. After sintering, α-CaSiO3 phase was the main phase accompanied with a small quantity of impurity phases in undoped ceramics, which transformed to the single β-CaSiO3 phase after Cu doping. The phase transformation could be attributed to the change of the geometric position of SiO4 tetrahedron. SEM images showed that grain morphology changed from irregular and loose particles to dense lath by Cu doping. The Ca0.985Cu0.015SiO3 ceramics sintered at 1125 °C exhibited excellent dielectric properties: εr = 5.22, Q × f = 18,948 GHz, τf =  − 63 ppm/°C, and these make the ceramics promising for use in microwave applications.

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Funding

This study was supported by the fund of the Applied Basic Research Foundation of Yunnan Province (Grant Nos. 202002AB080001-1), Major Science and Technology Programs of Yunnan Province (Grant Nos. 202102AB080008), and the Science and Technology Program of Yunnan Precious Metal Laboratory (Grant Nos. YPML-2022050205).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming, 650106, People’s Republic of China

    Gang Wang, Zehui Lin, Menghong Li, Jiaqi He, Mingwei Li, Yutong Li, Jiao Han, Jisong Liu & Yiming Zeng

  2. School of Materials Science and Engineering, Yunnan University, Kunming, 650091, People’s Republic of China

    Haiqiang Xiao

  3. College of Information Science & Technology, Chengdu University of Technology, Chengdu, 610059, People’s Republic of China

    Yuanming Lai

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  1. Gang Wang
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by GW, ZL, ML, JH, ML, YL and HX. The first draft of the manuscript was written by GW. YZ, JH and YL commented on previous versions of the manuscript. JL participated in the revision of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jiao Han, Jisong Liu or Yiming Zeng.

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Wang, G., Lin, Z., Li, M. et al. Effects of Cu doping on phase composition, crystal structure, and dielectric properties of CaSiO3 ceramics. J Mater Sci: Mater Electron 34, 815 (2023). https://doi.org/10.1007/s10854-023-10204-4

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