高电压技术2017，Vol.43Issue(7)：2204-2210,7.DOI:10.13336/j.1003-6520.hve.20170628014
三明治结构聚偏氟乙烯基复合介质的微结构设计及介电特性
Microstructure Design and Dielectric Properties of Sandwich Structured Poly (Vinylidene Fluoride) Based Dielectric Composite
摘要
Abstract
In order to investigate the influences of the filling phases and the sandwich structure on the dielectric and energy storage properties of polyvinylidene fluoride(PVDF) dielectric composite,the single composites and the sandwich-structured composites with inorganic fillers of two-dimensional boron nitride sheets and barium titanate particles were prepared by solution casting and hot pressing process.The crystal structure and morphology of the composite films were analyzed by X ray diffraction and scanning electron microscopy.The dielectric properties and energy storage properties of the thin films were obtained by using a broadband dielectric spectrometer and a ferroelectric tester.The results show that the sandwich structure of the composite film has excellent properties,including that the relative dielectric constant of BN-PVDF/BaTiO3-PVDF/BN-PVDF sandwich structure composite films is 13 at 10 Hz.The discharged energy density of this composite film is up to 6.2 J/cm3 at 350 MV/m,which is 1.6 times higher than that of BaTiO3-PVDF composite films.Its breakdown strength is as high as 370 MV/m,which is 1.5 times greater than that of BaTiO3-PVDF composite.In addition,its discharged efficiency keeps at 0.55.In conclusion,because the two-dimensional BN thin plate introduced in the upper and lower two layers of sandwich structure enhances the breakdown strength of thin films,the saturation polarization is delayed.The introduction of BaTiO3 in the intermediate layer will enhance the polarization property.Therefore,the PVDF composite films with the excellent dielectric property and energy storage characteristic can be obtained.关键词
储能密度/氮化硼/钛酸钡/聚偏氟乙烯/三明治结构/复合介质Key words
energy storage density/boron nitride/barium titanate/polyvinylidene fluoride/sandwich structure/dielectric composite引用本文复制引用
迟庆国,陈辰,张月,张昌海,王暄,雷清泉..三明治结构聚偏氟乙烯基复合介质的微结构设计及介电特性[J].高电压技术,2017,43(7):2204-2210,7.基金项目
国家自然科学基金(61640019) （61640019）
电子薄膜材料与集成器件国家重点实验室开放基金(KFJJ201601) （KFJJ201601）
哈尔滨理工大学青年拔尖创新人才培养基金(201102).Project supported by National Natural Science Foundation of China(61640019),Open Foundation of State Key Laboratory of Electronic Thin Films and Integrated Devices(KFJJ201601),Science Funds for the Young Innovative Talents of HUST(201102). （201102）
