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首页> 外文期刊>Journal of materials science >The dimensional effect of MgTiO_3 ceramic filler on the microwave dielectric properties of PTFE/MgTiO_3 composite with ultra-low dielectric loss
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The dimensional effect of MgTiO_3 ceramic filler on the microwave dielectric properties of PTFE/MgTiO_3 composite with ultra-low dielectric loss

机译：MgTiO_3陶瓷填料的尺寸效应对介电损耗超低的PTFE / MgTiO_3复合材料的微波介电性能

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摘要

PTFE matrix loaded with different volume fractions of MgTiO3 ceramic powder with particle sizes of around 5m and 15m (abbreviated as MT-5 and MT-15, respectively) was prepared. The microstructure, microwave dielectric properties and thermal properties of the composites were studied by scanning electron microscope, vector network analyzer and thermal dilatometer. The results show that PTFE/MT-15 composite exhibits higher relative density and better dielectric properties than the PTFE/MT-5 composite, since the former with coarse particles possesses lower surface energy to weaken the particle agglomeration effect. Even at 40% filler volume fraction, the ultra-low dielectric loss of PTFE/MT-15 composite can be maintained in the order of 10(-4)at 10GHz. Different models are used to predict the dielectric constant of the composites. Among which, the effective medium theory shows the least deviation from the experimental results. PTFE matrix filled with 40V% MT-15 ceramic powder shows excellent microwave dielectric properties: epsilon(r)=5.5, tan=2.7x10(-4) (at 10GHz), which may be a promising material in electronic packaging field.
机译：制备了负载有不同体积分数的MgTiO3陶瓷粉末的PTFE基体，其粒径约为5m和15m（分别缩写为MT-5和MT-15）。通过扫描电子显微镜，矢量网络分析仪和热膨胀仪研究了复合材料的微观结构，微波介电性能和热性能。结果表明，PTFE / MT-15复合材料比PTFE / MT-5复合材料具有更高的相对密度和更好的介电性能，因为前者具有较粗的颗粒具有较低的表面能，从而减弱了颗粒的团聚作用。即使填料体积分数为40％，PTFE / MT-15复合材料在10GHz时的超低介电损耗也可保持在10（-4）的数量级。使用不同的模型来预测复合材料的介电常数。其中，有效介质理论与实验结果的偏差最小。填充有40V％MT-15陶瓷粉末的PTFE基体显示出优异的微波介电性能：epsilon（r）= 5.5，tan = 2.7x10（-4）（在10GHz下），可能是电子包装领域的有希望的材料。

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  • 来源
    《Journal of materials science》 |2019年第7期|6680-6687|共8页
  • 作者

    Peng Haiyi; Ren Haishen; Dang Mingzhao; Zhang Yi; Gu Zhongyuan; Yao Xiaogang; Lin Huixing;

  • 作者单位

    Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China|Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China|Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China|Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China;

    Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China;

    Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China;

    Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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