| 纳米SiOx／LDPE复合材料电导机理的研究 |
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| 引用本文： | 陈炯,尹毅,李喆,肖登明.纳米SiOx／LDPE复合材料电导机理的研究[J].电线电缆,2009(6):21-24. |
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| 作者姓名： | 陈炯 尹毅 李喆 肖登明 |
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| 作者单位： | 1. 上海电力学院,上海,200090
2. 上海交通大学电气工程系,上海,200030 |
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| 摘 要： | 以双溶液共混的方法制备了不同浓度的纳米SiOx／LDPE聚合物复合材料，并利用x射线衍射（XRD）对复合材料的结晶形态进行了测量。测量结果表明，纳米SiOx粒子的添加，使低密度聚乙烯（LDPE）的晶粒尺寸变小、结晶度变大。利用微电流计对不同浓度的纳米SiOx／LDPE聚合物复合材料在293-353K的温度范围内进行电导测量。结合计算机曲线拟舍技术，对空间电荷限制电流、肖特基效应、普尔．弗兰凯尔效应、离子跳跃电导模型进行了研究。研究表明，纯LDPE的电导模型以空间电荷限制电流为主，纳米SiOx／LDPE复合材料的电导以离子跳跃电导为主，并且其跳跃距离随温度的增加而增加。
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| 关 键 词： | 低密度聚乙烯 纳米SiOx 强场电导 X射线衍射 |
The Study on High Field Conduction in the Composites of Low-Density-Polyethylene/Nano-SiO_x |
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| CHEN Jiong,et al.The Study on High Field Conduction in the Composites of Low-Density-Polyethylene/Nano-SiO_x[J].Wire & Cable,2009(6):21-24. |
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| Authors: | CHEN Jiong |
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| Affiliation: | CHEN Jiong,et al(Shanghai University of Electric Power,Shanghai 200090,China) |
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| Abstract: | Molecular structure and morphology of a composite of low-density-polyethylene (LDPE) and nano-SiO_x prepared by the method of double-solution mixture were studied by X-ray Diffraction(XRD).It can been seen that the degree of crystallization increases,and the size of crystal become small,when the nano-SiO_x particles are added in LDPE.High-electric-field conduction in the composites was investigated in the range of 293～353 K.In order to find out the mechanism of high field conduction in nano-SiO_x/LDPE,Schottky effect,Poole-Frenkel effect,space-charge-limited conduction(SCLC),and ion hoppingconduction are studied.It is pointed out that space-charge-limited conduction fits well for pure LDPE.Both Schottky effect and Poole-Frenkel effect do not fit well for all of the samples.Ion hopping conduction fits for the composite of LDPE/nano-SiO_x,and the hopping distances of the composite increases with increasing temperature. |
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| Keywords: | low-density-polyethylene nano-SiO_x high field conduction X-ray Diffraction |
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