Excellent dielectric properties of anisotropic polymer composites filled with parallel aligned zinc flakes,

Ye Zhang (1) , Yao Wang (1) , Yuan Deng (2) , Yanjingtian Guo (1) , Wencheng Bi , Mao Li (1) , Yu Luo (1) , Jinbo Bai (3)

1 School of Chemistry and Environment, BeiHang University, Beijing 100191, PR China
2 School of Chemistry and Environment
3 MSSMat - Laboratoire de mécanique des sols, structures et matériaux

Orderly polymer composites based on polyvinylidene fluoride assembled with parallel aligned zinc flakes were fabricated by a simple process. It is interesting to note that the microstructure of parallel arrangement could introduce excellent dielectric properties with obvious anisotropic dielectric behaviors. The dielectric constant in the parallel direction was obviously higher than that of the perpendicular direction. And the anisotropic intensity of interfacial polarization is proposed to interpret the anisotropic dielectric constant. Also, an equivalent circuit model of two parallel RC circuits in series, based on the analysis of impedance data, is employed to further discuss the anisotropic dielectric behavior.

Domaines: Micro et nanotechnologies/Microélectronique

Ye Zhang, Yao Wang, Yuan Deng, Yanjingtian Guo, Wencheng Bi, et al.. Excellent dielectric properties of anisotropic polymer composites filled with parallel aligned zinc flakes,. Applied Physics Letters, 2012, 101 (19), 192904 (4 p.). ⟨10.1063/1.4766923⟩. ⟨hal-00750680⟩