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Structural Dependence of Microwave Dielectric Properties of Spinel-Structured Li2ZnTi3O8 Ceramic: Crystal Structure Refinement and Raman Spectroscopy Study

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Abstract

The relationship between the structure and microwave dielectric properties of spinel-structured Li2ZnTi3O8 ceramic has been studied by structure refinement and Raman spectroscopy analysis. The vibration modes of Li2ZnTi3O8 were classified by group-theoretical analysis, and the observed Raman spectra of Li2ZnTi3O8 ceramic assigned. The correlations between bond strengths, packing fraction, the stretch mode of the oxygen octahedron (A 1g(1) mode), and the microwave dielectric properties are discussed. With increase of the A 1g(1) Raman shift, the oxygen octahedron became rigid, thereby decreasing the dielectric constant (ε r). With increasing packing fraction and decreasing full-width at half-maximum (FWHM) of A 1g(1) mode, the lattice anharmonic vibration decreased, the damping behavior of A 1g(1) stretch vibration became weaker, and the intrinsic quality factor (Q × f) accordingly increased. The temperature coefficient of resonant frequency (τ f ) improved with the increase of bond strength, irrespective of oxygen octahedron distortion.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC-51174118), “333” High-Level Talents Training Project of Jiangsu Province, “Blue Project” of Jiangsu Province, Project of the “PAPD” of Jiangsu Higher Education Institutions, and Project of State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology (No. P2015-02).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing, 211167, China

    Xuepeng Lu

  2. Jiangsu Province Advanced Structural Materials and Application Technology Laboratory, Nanjing, 211167, China

    Xuepeng Lu & Yong Zheng

  3. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Qi Huang & Zuowei Dong

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  1. Xuepeng Lu
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  2. Yong Zheng
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  3. Qi Huang
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  4. Zuowei Dong
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Correspondence to Yong Zheng.

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Lu, X., Zheng, Y., Huang, Q. et al. Structural Dependence of Microwave Dielectric Properties of Spinel-Structured Li2ZnTi3O8 Ceramic: Crystal Structure Refinement and Raman Spectroscopy Study. J. Electron. Mater. 45, 940–946 (2016). https://doi.org/10.1007/s11664-015-4232-4

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  • DOI: https://doi.org/10.1007/s11664-015-4232-4

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