Interfacial effects on the dielectric properties of elastomer/carbon-black/ceramic composites
Interfacial effects on the dielectric properties of elastomer/carbon-black/ceramic composites
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DOI：
10.1557/s43580-021-00041-0
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发表时间：
2021-03-09
期刊：
影响因子：
0.8
通讯作者：
Manias, Evangelos
中科院分区：
文献类型：
--
作者：
Li, Bo;Sarkarat, Maryam;Manias, Evangelos
研究了一系列系统的三元乙丙橡胶 (EPDM) 弹性体/炭黑复合材料，以量化附加陶瓷填料的影响，尤其是界面贡献对复合材料介电性能的影响。所有系统中都存在界面对复合材料介电性能的显着贡献。对于所研究的所有复合材料（使用具有不同介电性质且介电常数跨越多个数量级的陶瓷填料），界面贡献压倒了陶瓷填料的 k 值并主导了复合材料的介电性能。炭黑和陶瓷填料之间的重要相互作用也得到了体现，这使人们对用于预测此类复合材料介电常数的标准模型的有效性产生了怀疑。图文摘要
A systematic series of ethylene-propylene-diene (EPDM) elastomer/carbon-black composites were studied to quantify the effect of additional ceramic fillers, especially of the interfacial contributions, on the dielectric properties of the composites. Substantial interfacial contributions to the composites' dielectric properties were present in all systems. For all composites studied-using ceramic fillers with varied dielectric nature and spanning orders of magnitude in dielectric constants-the interfacial contributions overwhelmed the ceramic filler k-values and dominated the dielectric performance of the composites. Non-trivial interplays between the carbon black and the ceramic fillers were also manifested, casting doubts on the validity of standard models used for the prediction of dielectric permittivities of such composites. Graphic abstract