Enhanced dielectric permittivity of a flexible three-phase polyimide-graphene-BaTiO3 composite material
Enhanced dielectric permittivity of a flexible three-phase polyimide-graphene-BaTiO3 composite material
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DOI：
10.1016/j.matlet.2014.02.105
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发表时间：
2014-06-01
影响因子：
3
通讯作者：
Wu, Dezhen
中科院分区：
文献类型：
--
作者：
Liu, Jingni;Tian, Guofeng;Wu, Dezhen
以石墨烯和钛酸钡纳米粒子为填料，聚酰亚胺（PI）为基体，制备了一种具有增强介电常数的柔性三相复合材料。对PI-石墨烯-BaTiO 3复合材料在10（2）至10（6）Hz频率范围内的介电性能的研究表明，由于其独特的尺寸结构，它们具有优异的介电常数（epsilon = 170.39）和较低的介电损耗。结合渗流理论和微电容模型，计算了复合材料的渗流阈值为1.11vol%，并对复合材料介电常数的提高机理进行了探讨。(C)2014爱思唯尔有限公司版权所有。
A flexible three-phase composite material with enhanced dielectric permittivity was prepared with both graphene and BaTiO3 nanoparticles as fillers and polyimide (PI) as matrix. Studies on the dielectric properties of PI-graphene-BaTiO3 composite materials in the frequency range from 10(2) to 10(6) Hz show that they possess excellent dielectric permittivity (epsilon = 170.39) and lower dielectric loss thanks to their unique dimensional structure. In consideration of the percolation theory and microcapacitor model, a percolation threshold of 1.11 vol% was calculated and the mechanism of the enhancement of the dielectric permittivity of the composite material was discussed. (C) 2014 Elsevier B.V. All rights reserved.