Enhancement of dielectric and electrical properties in BT/SiC/PVDF three-phase composite through microstructure tailoring
Enhancement of dielectric and electrical properties in BT/SiC/PVDF three-phase composite through microstructure tailoring
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通过微观结构定制增强 BT/SiC/PVDF 三相复合材料的介电和电性能
DOI：
10.1016/j.compositesa.2015.04.002
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发表时间：
2015-07
影响因子：
8.7
通讯作者：
Zhang Zuoguang
中科院分区：
文献类型：
--
作者：
Zhang Zhenchong;Gu Yizhuo;Wang Shaokai;Li Min;Bi Jiayu;Zhang Zuoguang
将平均直径为500 nm-1 μm的碳化硅（SiC）晶须嵌入聚偏氟乙烯（PVDF）中，制备了具有高介电常数的聚合物复合材料。然而，两相复合材料的高介电损耗和导电性阻碍了其潜在的应用。采用平均直径为100 nm和1 μm的钛酸钡（BT）颗粒作为第三相制备了三相复合材料。研究了BT颗粒加入前后的形貌结构、介电性能和电学性能。三相复合材料在不牺牲高介电常数的情况下，大大抑制了介质损耗和电导率，这是两相复合材料难以实现的。纳米尺寸的BT比微尺寸的BT更有利于获得高介电常数，两者的介电损耗和电导率相似。此外，电模量分析证实了在很大程度上抑制了电子传导过程，从而提高了三相复合材料的介电性能和电学性能。
A polymer composite with high dielectric permittivity was prepared by embedding silicon carbide (SiC) whisker with an average diameter of 500 nm–1 μm in poly(vinylidene fluoride) (PVDF). However, the high dielectric loss and electrical conductivity of the two-phase composite prohibits its potential applications. Barium titanate (BT) particles with average diameter of 100 nm and 1 μm were incorporated as a third phase to fabricate a three-phase composite. The morphology structure, dielectric and electrical properties before and after the addition of BT particles were investigated. The three-phase composite exhibits largely suppressed dielectric loss and electrical conductivity without sacrificing the high dielectric permittivity, which was extremely hard to be realized for two-phase composite. It is also found that the nano-size BT is more favorable in achieving high dielectric permittivity than the micro-size BT, where their dielectric loss and electrical conductivity are similar. Furthermore, electric modulus analysis confirms the largely suppressed electron conduction process which results in the enhanced dielectric and electrical properties in three-phase composite.
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影响因子：
4
作者：
Jinkai Yuan;Weilong Li;S. Yao;Youqin Lin;A. Sylvestre;J. Bai
通讯作者：
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DOI：
10.1016/j.compositesa.2014.06.006
发表时间：
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影响因子：
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作者：
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DOI：
10.1016/j.compositesa.2006.02.002
发表时间：
2007
影响因子：
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作者：
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作者：
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