A distinct mutual phase transition in a new PVDF based lead-free composite film with enhanced dielectric and energy storage performance and low loss

doi:10.1039/C6TC04648G

	A distinct mutual phase transition in a new PVDF based lead-free composite film with enhanced dielectric and energy storage performance and low loss
	Guo, Dong 1,3; Cai, Kai 2; Wang, Yunli 3,4
刊名	Journal of Materials Chemistry C
	2017
卷号	5 期号:10 页码:2531-2541
ISSN号	20507534
DOI	10.1039/C6TC04648G
英文摘要	Environment-friendly polyvinylidene fluoride (PVDF) based composite films were fabricated by using a high permittivity lead-free Ba(Sn,Ti)O3-(Ba,Ca)TiO3(BCTS) ceramic filler with a special ‘tricritical' phase structure. The dielectric and energy storage performance and the microstructure evolution of the samples were investigated. Infrared spectroscopy, X-ray diffraction (XRD) and synchrotron radiation XRD results showed that the plate-shaped BCTS nanopowders induced a distinct mutual phase transition but not the usual nonpolar to polar one. Consequently, a largely increased dielectric constant (Εr), a higher energy density (∼4 J cm−3at 200 kV mm−1) and a dielectric loss even lower than that of neat PVDF were simultaneously achieved with a very small loading (0.59 vol%) of BCTS. Theoretical simulations showed that Εrwas well predicted by the effective medium theory and the modified Lichtenecker model, implying the important role of the size and shape of filler particles in performance. A special transitional stratification layer observed around the BCTS particles implies heterogeneous nucleation of the polymer. A mechanism due to the interplay of crystallization and possible stress and electrostatic interaction was proposed to explain the phase evolution. The results may provide new insight into the understanding of the structural characteristics of the composites and a new strategy for tailoring their performance. © The Royal Society of Chemistry.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25509]
专题	中国科学院上海硅酸盐研究所
作者单位	1.School of Materials Science and Engineering, Beihang University, Beijing; 100191, China; 2.Beijing Center for Physical and Chemical Analysis, Beijing; 100089, China; 3.Institute of Acoustics, Chinese Academy of Sciences, Beijing; 100190, China; 4.Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China
推荐引用方式 GB/T 7714	Guo, Dong,Cai, Kai,Wang, Yunli. A distinct mutual phase transition in a new PVDF based lead-free composite film with enhanced dielectric and energy storage performance and low loss[J]. Journal of Materials Chemistry C,2017,5(10):2531-2541.
APA	Guo, Dong,Cai, Kai,&Wang, Yunli.(2017).A distinct mutual phase transition in a new PVDF based lead-free composite film with enhanced dielectric and energy storage performance and low loss.Journal of Materials Chemistry C,5(10),2531-2541.
MLA	Guo, Dong,et al."A distinct mutual phase transition in a new PVDF based lead-free composite film with enhanced dielectric and energy storage performance and low loss".Journal of Materials Chemistry C 5.10(2017):2531-2541.