聚合物基半导体纳米复合电介质材料的制备与性能研究

发布时间：2018-01-14 15:34

本文关键词：聚合物基半导体纳米复合电介质材料的制备与性能研究　出处：《深圳大学》2017年硕士论文　论文类型：学位论文

【摘要】：电介质材料在微电子、高压绝缘以及储能领域具有重要的应用价值,因此得到国内外研究者的广泛关注。尽管研究者们对电介质材料的介电性能和储能行为进行了较为深入的研究,也取得了很多突破性的成果,但在聚合物基电介质复合材料领域,还存在很多亟待解决的问题,尤其是高含量下介电损耗过高,击穿强度急速下降的难题。因此,本论文以探讨界面结构对击穿强度和储能行为的影响为研究目的,制备了具有优异介电和耐电压性能的电介质聚合物纳米复合材料。采用纳米半导体颗粒作为复合材料的填料,研究了半导体填料对介电、击穿、储能、导热等性能的影响,并在此基础之上,设计并制备出高含量下抑制损耗增加及能够保持较高的击穿强度的复合材料。首先,为了提高聚合物复合材料的介电和储能性能,本文选取了纳米ZnO和ZnS作为复合材料填料的研究对象,并与具有铁电性质的聚合物——聚偏氟乙烯(PVDF)进行复合,制备出具有高介电、高储能的聚合物复合材料。对一系列样品进行了介电、耐压绝缘、储能、导热、热稳定等性能的测试分析,结果发现,介电常数随着填料的增加而增加;低含量下,储能密度和击穿强度得到显著提升,说明ZnS和ZnO在电子封装、高压电气等领域具有潜在的应用。其次,在前述氧化锌和硫化锌的研究基础之上,进一步制备了纳米ZnO-ZnS复合颗粒填料,再与聚偏氟乙烯进行复合,得到三相的复合材料。结果表明:随着填料的含量增加,复合材料的介电损耗得到了有效的抑制,且高含量下击穿强度依旧保持较高水平。相比同含量下ZnS和ZnO,三相复合材料的储能密度和击穿强度均有显著提升。
[Abstract]:Dielectric materials have important applications in the fields of microelectronics, high-voltage insulation and energy storage. Therefore, researchers at home and abroad have paid close attention to the dielectric properties and energy storage behavior of dielectric materials, and have made a lot of breakthrough results. However, in the field of polymer based dielectric composites, there are still many problems to be solved, especially the problem of high dielectric loss and rapid decrease of breakdown strength under high content. The purpose of this thesis is to investigate the effect of interface structure on breakdown strength and energy storage behavior. Dielectric polymer nanocomposites with excellent dielectric and voltage resistance properties were prepared. On the basis of the influence of thermal conductivity and other properties, a composite material with high content to restrain loss increase and maintain high breakdown strength was designed and fabricated. In order to improve the dielectric and energy storage properties of polymer composites, nano-sized ZnO and ZnS were selected as the research objects of composite fillers in this paper. A series of polymer composites with high dielectric and high storage energy were prepared by composite with PVDF, a polymer with ferroelectric properties. A series of samples were insulated with dielectric and voltage resistance. The results show that the dielectric constant increases with the increase of filler. At low content, the energy storage density and breakdown strength are significantly increased, indicating that ZnS and ZnO have potential applications in electronic packaging, high-voltage electrical and other fields. Secondly. On the basis of the study of zinc oxide and zinc sulfide, nano-sized ZnO-ZnS composite particle filler was further prepared, and then it was compounded with polyvinylidene fluoride (PVDF). The results show that the dielectric loss of the composites is restrained effectively with the increase of filler content. The energy storage density and breakdown strength of the three-phase composites increased significantly compared with the same content of ZnS and ZnO.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB383.1;TB33

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