电致伸缩
材料科学
铁电性
结晶度
电介质
共聚物
极化(电化学)
辐照
微晶
介电常数
复合材料
电子束处理
电子
氟化物
聚合物
压电
光电子学
物理化学
无机化学
物理
核物理学
化学
冶金
量子力学
作者
Vivek Bharti,Xingzhong Zhao,Q.M. Zhang,T. Romotowski,F. Tito,Robert Y. Ting
标识
DOI:10.1007/s100190050063
摘要
The influence of electron dosage on the field induced strain, dielectric constant, and polarization response has been investigated in electron irradiated poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) 50/50 copolymer. It was found that under suitable electron dosage an ultrahigh electrostrictive strain can be achieved. Interestingly, material after irradiation exhibits many features resembling those of relaxor ferroelectrics, suggesting that the electron irradiation breaks up the coherent polarization domain in normal ferroelectric P(VDF-TrFE) copolymer into nano-polar regions that transform the material into a relaxor ferroelectric. In addition, many of the material properties including the field induced polarization, the electrostrictive strain, and elastic modulus exhibit irregular change (non-monotonical) with electron dosage, indicating a complex relation among the crosslinking density, crystallinity, crystallite size, and molecular conformation in determining the material responses.
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