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首页> 外文期刊>CERAMICS INTERNATIONAL >Effects of coupling agent on dielectric properties of PTFE based and Li2Mg3TiO6 filled composites
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Effects of coupling agent on dielectric properties of PTFE based and Li2Mg3TiO6 filled composites

机译：偶联剂对基于PTFE和Li2Mg3tio6填充复合材料的介电性能的影响

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摘要

In this study, Li2Mg3TiO6 (LMT) ceramic powders were synthesized by conventional solid state route, optimized using perfluorooctyltriethoxysilane (F8261) and then loaded into polytetrafluoroethylene (PTFE) emulsion. The effects of F8261 on the surface characteristics of LMT particles were investigated by analyzing SEM, XPS and contact angle. After the coating of F8261, the surface energy of LMT was decreased, leading to a more compatible microstructure with PTFE matrix than untreated LMT particles. As a comparison, the untreated and optimized LMT/PTFE composites were fabricated with different content of LMT (ranged from 30 wt % to 70 wt %). As compared to untreated samples, the substrates loaded with F8261 optimized LMT exhibited better properties with higher dielectric constant and lower dielectric loss. Furthermore, the dielectric constant of optimized LMT filled composites matched well with the values calculated by Effective medium theory (EMT). The temperature coefficient of dielectric constant (tau(epsilon)) of the composites were theoretically discussed. Finally, F8261 optimized LMT/PTFE composites performed prominent dielectric properties of epsilon(r) = 6.17, tan delta = 0.0019 and tau(epsilon) = 123 ppm/degrees C at high optimized LMT loading of 70 wt %.
机译：在该研究中，通过常规固态途径合成Li2Mg3TiO6（LMT）陶瓷粉末，使用全氟辛基三乙氧基硅烷（F8261）优化，然后装入聚四氟乙烯（PTFE）乳液中。通过分析SEM，XPS和接触角来研究F8261对LMT颗粒表面特性的影响。在F8261涂覆后，LMT的表面能降低，导致具有比未处理的LMT颗粒的PTFE基质更加相容的微观结构。作为比较，将未处理和优化的LMT / PTFE复合材料用不同的LMT含量（范围为30wt％至70wt％）制造。与未经处理的样品相比，装有F8261的基板优化LMT具有更好的介电常数和较低介电损耗的更好的性能。此外，优化的LMT填充复合材料的介电常数与通过有效介质理论（EMT）计算的值良好匹配。理论上讨论了复合材料的介电常数（Tau（ε））的温度系数。最后，F8261优化的LMT / PTFE复合材料表现了ε（R）= 6.17，Tanδ= 0.0019和Tau（epsilon）= 123ppm /℃的高优化Lmt负载量为70wt％。

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  • 来源
    《CERAMICS INTERNATIONAL》 |2019年第16期|共7页
  • 作者

    Luo Fuchuan; Tang Bin; Fang Zixuan; Yuan Ying; Li Hao; Zhang Shuren;

  • 作者单位

    Univ Elect Sci &

    Technol China Natl Engn Ctr Electromagnet Radiat Control Mat Jianshe Rd Chengdu 610054 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol China Natl Engn Ctr Electromagnet Radiat Control Mat Jianshe Rd Chengdu 610054 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol China Natl Engn Ctr Electromagnet Radiat Control Mat Jianshe Rd Chengdu 610054 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol China Natl Engn Ctr Electromagnet Radiat Control Mat Jianshe Rd Chengdu 610054 Sichuan Peoples R China;

    Hunan Univ Coll Elect &

    Informat Engn Changsha 410082 Hunan Peoples R China;

    Univ Elect Sci &

    Technol China Natl Engn Ctr Electromagnet Radiat Control Mat Jianshe Rd Chengdu 610054 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 陶瓷工业;硅酸盐工业;
  • 关键词

    PTFE; Li2Mg3TiO6; Microstructure; Water absorption; Dielectric properties;

    机译：PTFE;LI2MG3TIO6;微观结构;吸水;介电性能;

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