Preparation and wide-frequency dielectric properties of (Ba 0.5Sr0.4Ca0.1)TiO3/poly(vinylidene fluoride) composites

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[1] [1,Huang, Er-Quan

[2] Zhao, Jun

[3] Zha, Jun-Wei

[4] Zhang, Liang

[5] Liao, Rui-Jin

[6] 1,Dang, Zhi-Min

来源：

Dang, Z.-M. (dangzm@ustb.edu.cn) | 1600年 / American Institute of Physics Inc.卷 / 115期

关键词：

Poly(vinylidene fluoride) (PVDF) and (Ba0.5S r0.4Ca0.1)TiO3 (BSCT) are used as matrix and fillers; respectively; to prepare polymer functional composites by solution casting with N; N-dimethyl formamide as a solvent. It is found that the addition of BSCT has significant influence on the crystallization; melting; and glass transition behaviors of the PVDF matrix. The dielectric properties of the BSCT/PVDF composites are studied over a wide frequency range from 100 Hz to 1 GHz and a wide temperature range from -50 °C to 100 °C to explore the dependences of frequency and temperature. High dielectric constant (Ε) up to 132 at 100 Hz and low dielectric loss (tan δ) down to 0.0045 at 1 GHz are achieved for the BSCT/PVDF composites. The obtained data of Ε are also theoretically fit by different models; and the modified Lichtenecker equation and Jayasundere-Smith equation show the best match. © 2014 AIP Publishing LLC;

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