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Effect of Vanadium Content on the Microwave Dielectric Properties of Sr2VxO7 (1.80 ≤ x ≤ 2.05) Ceramics

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Abstract

Vanadium content has a prominent effect on the microwave dielectric properties of Sr2VxO7 (1.80 ≤ x ≤ 2.05) ceramics, which is related to extrinsic factors and intrinsic factors, such as secondary phase, bulk density, crystal structure, and V–O bond length. Rietveld refinement, energy dispersive spectroscopy, and Raman spectra analysis revealed that an appropriate vanadium deficiency causes the appearance of secondary phase Sr3V2O8, which results in the variation of unit cell volume and the significant improvement of Q × f value and the temperature coefficient of resonant frequency. Specifically, the Sr2V1.90O7 ceramic sintered at 950°C possesses optimum microwave dielectric performances: the dielectric constant of 11.1, the Q × f value of 36,500 GHz, and the temperature coefficient of resonant frequency of − 35.6 ppm/°C.

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Authors and Affiliations

  1. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China

    Pengyu Yao, Yaping Deng & Bo Li

  2. State Key Laboratory of Electronic Thin Films and Integrated Devices, Chengdu, China

    Bo Li

  3. National Engineering Research Center of Electromagnetic Radiation Control Materials, Chengdu, China

    Bo Li

Authors
  1. Pengyu Yao
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  2. Yaping Deng
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  3. Bo Li
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Correspondence to Bo Li.

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Yao, P., Deng, Y. & Li, B. Effect of Vanadium Content on the Microwave Dielectric Properties of Sr2VxO7 (1.80 ≤ x ≤ 2.05) Ceramics. J. Electron. Mater. 49, 6136–6142 (2020). https://doi.org/10.1007/s11664-020-08360-y

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  • DOI: https://doi.org/10.1007/s11664-020-08360-y

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