| 纳米银/聚丙烯酰胺/乙烯-醋酸乙烯酯共聚物复合材料的电性能 |
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| 引用本文： | 徐曼,冯军强,曹晓珑.纳米银/聚丙烯酰胺/乙烯-醋酸乙烯酯共聚物复合材料的电性能[J].上海大学学报(英文版),2008,12(1):85-90. |
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| 作者姓名： | 徐曼 冯军强 曹晓珑 |
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| 作者单位： | State Key Laboratory of Electrical Insulation for Power Equipment, Xi＇an Jiaotong University, Xi＇an 710049, P. R. China |
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| 摘 要： | Nano-Ag particles/polyacrylamide （PAM） composites were synthesized by γ irradiation method and then blended with ethylene vinyl acetate （EVA）. Dielectric behaviors of the Ag/PAM/EVA composites are investigated as a function of both the concentration and size of Ag particles. When concentration of the Ag fillers is rarely low, dielectric anomalies were first observed in contrast to the traditional percolation theory. As concentration of Ag increases, volume resistivity and breakdown field strength are enhanced, loss tangent （tan δ） reduced and dielectric constant kept invariable. In addition, the above variation became larger when the diameter of the Ag nano-particles is smaller. Such dielectric anomalies may be understood by considering the unique ＂Coulomb Blockade Effect＂ of the nano-sized Ag particles.
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| 关 键 词： | 纳米银 聚丙烯酰胺 乙烯-醋酸乙烯酯 共聚物 复合材料 电性能 |
| 文章编号： | 10.1007/s11741-008-0117-1 |
| 收稿时间： | 2006-06-19 |
| 修稿时间： | 2006-09-18 |
Electrical properties of nano-silver/polyacrylamide/ethylene vinyl acetate composite |
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| XU Man,FENG Jun-qiang,CAO Xiao-long.Electrical properties of nano-silver/polyacrylamide/ethylene vinyl acetate composite[J].Journal of Shanghai University(English Edition),2008,12(1):85-90. |
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| Authors: | XU Man FENG Jun-qiang CAO Xiao-long |
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| Institution: | State Key Laboratory of Electrical Insulation for Power Equipment, Xi'an Jiaotong University, Xi'an 710049, P. R. China |
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| Abstract: | Nano-Ag particles/polyacrylamide (PAM) composites were synthesized by "y irradiation method and then blendedwith ethylene vinyl acetate (EVA). Dielectric behaviors of the Ag/PAM/EVA composites are investigated as a function ofboth the concentration and size of Ag particles. When concentration of the Ag fillers is rarely low, dielectric anomalieswere first observed in contrast to the traditional percolation theory. As concentration of Ag increases, volume resistivityand breakdown field strength are enhanced, loss tangent (tan δ) reduced and dielectric constant kept invariable. In addition,the above variation became larger when the diameter of the Ag nano-particles is smaller. Such dielectric anomalies may beunderstood by considering the unique "Coulomb Blockade Effect" of the nano-sized Ag particles. |
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| Keywords: | nano-silver (Ag) dielectrics composite electrical property |
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