High dielectric constant and low loss in polymer composites filled by self-passivated zinc particles
High dielectric constant and low loss in polymer composites filled by self-passivated zinc particles
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DOI：
10.1016/j.matlet.2011.12.080
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发表时间：
2012-04
影响因子：
3
通讯作者：
Ye Zhang;Yao Wang;Yuan Deng;Mao Li;J. Bai
中科院分区：
文献类型：
--
作者：
Ye Zhang;Yao Wang;Yuan Deng;Mao Li;J. Bai
采用絮凝法制备了自钝化锌粒子填充聚偏氟乙烯（PVDF）复合材料。测试结果表明，填充量为0.24的Zn/PVDF复合材料具有优异的介电性能，在103 Hz处的介电常数和损耗分别为52和0.05。高介电常数的原因是界面极化增强，而低介电损耗的原因主要是碳酸锌氢氧化物自钝化层作为绝缘界面，通过阻挡相邻Zn填料之间载流子的自由转移，有效地降低了漏电流。所开发的聚合物复合材料具有良好的介电性能，是潜在的嵌入式电容器的应用。
Polyvinylidene fluoride (PVDF) composites filled by self-passivated zinc (Zn) particles were fabricated through a simple method of flocculation. The following measurement exhibits that the Zn/PVDF composite with filler volume fraction of 0.24 possesses the excellent dielectric properties, and the obtained dielectric constant and loss at 103Hz were 52 and 0.05, respectively. It's considered that high dielectric constant is originated from the enhanced interfacial polarization, while the low loss is due mainly to the self-passivation layer of zinc carbonate hydroxide, which can serve as the insulating interface and reduce leakage current effectively through blocking the free transfer of charge carriers between adjacent Zn fillers. The developed polymer composites with favorable dielectric properties are potential for embedded capacitor applications.