The effect of ac field amplitude on the relaxor behaviors in Langmuir–Blodgett terpolymer films
The effect of ac field amplitude on the relaxor behaviors in Langmuir–Blodgett terpolymer films
复制标题
DOI：
10.1063/1.3267159
复制
发表时间：
2009-12
影响因子：
3.2
通讯作者：
Xiangjian Meng;Jianlu Wang;Haisheng Xu;Jinglan Sun;J. Chu
中科院分区：
文献类型：
--
作者：
Xiangjian Meng;Jianlu Wang;Haisheng Xu;Jinglan Sun;J. Chu
本文研究了聚偏氟乙烯-三氟乙烯-氯乙烯（PVDF-trifluoroethylene-chlorofluoroethylene）弛豫薄膜的介电响应与交流电场幅值的关系。在1.33 ~ 80 MV/m的范围内，介电常数最大值Tm的温度与频率的关系可用Vogel-Fulcher关系来描述。Tm在低于13.3MV/m的Eac水平下保持几乎恒定，并且随着Eac进一步增加而开始降低。当Eac低于26.7MV/m时，冻结温度Tf和激活能Ea变化不大，当Eac高于26.7MV/m时，Tf减小，而Ea增大。
The ac field (Eac) amplitude dependence of dielectric response has been investigated for poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) relaxor terpolymer films. The frequency dependence of the temperature of the permittivity maximum Tm can be well described by the Vogel–Fulcher relation for Eac in the range from 1.33 to 80 MV/m. Tm remains nearly constant at an Eac level lower than 13.3 MV/m, and starts decreasing with Eac increases further. The two parameters fitting to the Vogel–Fulcher relation, freezing temperature Tf and activation energy Ea, vary little for Eac below 26.7 MV/m and then Tf decreases, while Ea increases for higher Eac level.