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Dielectric properties of modified SrTiO3/PTFE composites for microwave RF antenna applications

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Abstract

SrTiO3/PTFE composites with high dielectric constant and low loss properties were prepared via powder processing technique. The structure, morphology, dielectric and thermal properties of the composites were characterized by X-ray diffraction, scanning electron microscope, coefficient of thermal expansion, and network analyzer. SrTiO3/PTFE composites with 60 wt% SrTiO3 are of high εr and high Q: εr = 12.19, Q × f = 1930 GHz. Additionally, theoretical models like Logarithmic mixture rule, Maxwell–Garnet, Effective medium theory and Smith’s model were also used to predict the dielectric constant of these composites. The values obtained by the EMT model are in well agreement with the experimental values.

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Acknowledgments

This work was supported by Science and Technology Projects of Guangdong Province (Project No. 2011A091103002), College Industrialization Project of Jiangsu Province (JHB2012-12), Jiangsu Collaborative Innovation Center for Advanced Inorganic Punction Composites and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China

    Shiqi Jin, Lixi Wang, Zhefei Wang, Baoyu Huang & Qitu Zhang

  2. Guangdong Fenghua Advanced Technology Company Limited, Zhaoqing, 526020, Guangdong, China

    Zhenxiao Fu

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  1. Shiqi Jin
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  3. Zhefei Wang
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Correspondence to Lixi Wang.

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Jin, S., Wang, L., Wang, Z. et al. Dielectric properties of modified SrTiO3/PTFE composites for microwave RF antenna applications. J Mater Sci: Mater Electron 26, 7431–7437 (2015). https://doi.org/10.1007/s10854-015-3374-8

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  • DOI: https://doi.org/10.1007/s10854-015-3374-8

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