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Lattice vibrational characteristics and dielectric properties of pure phase CaTiO3 ceramic

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Abstract

CaTiO3 microwave dielectric ceramic was fabricated utilizing traditional two-step sintering process. XRD pattern analysis after Rietveld refinement indicated a pure phase CaTiO3 sample. SEM image illustrated well-crystallized sample with uniform grain sizes and clear grain boundaries. The lattice vibrational characteristics were analyzed by Raman and IR spectroscopy, and the intrinsic properties were calculated in conjunction with the semi-quantum four-parameter (FPSQ) model, which turned out that the low-frequency vibrational modes contribute the most to the dielectric properties. Besides, the real and imaginary parts of the dielectric function were drawn from the FPSQ model. The intrinsic property results fitted from the FPSQ model agree well with the measured values.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Grant 11874240), Shandong Provincial Key Research and Development Program, China (No. 2019GGX101060), and the Opening Project of Key Laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences (No. KLIFMD201803).

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Author notes

  1. Feng Shi, Guang-en Fu and En-Cai Xiao contributed equally to this work and should be considered co-first authors.

Authors and Affiliations

  1. Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province, School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, China

    Feng Shi

  2. School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Feng Shi, Guang-en Fu & En-Cai Xiao

  3. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai, 264209, China

    Jianzhu Li

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  1. Feng Shi
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Correspondence to Feng Shi.

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Shi, F., Fu, Ge., Xiao, EC. et al. Lattice vibrational characteristics and dielectric properties of pure phase CaTiO3 ceramic. J Mater Sci: Mater Electron 31, 18070–18076 (2020). https://doi.org/10.1007/s10854-020-04357-9

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