| 二次渗滤现象对镍基导电硅橡胶屏蔽性能的影响 |
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| 引用本文： | 李鹏,刘顺华,陈光昀. 二次渗滤现象对镍基导电硅橡胶屏蔽性能的影响[J]. 物理学报, 2005, 54(7): 3332-3336 |
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| 作者姓名： | 李鹏 刘顺华 陈光昀 |
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| 作者单位： | 大连理工大学材料科学与工程系，大连 116023 |
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| 基金项目： | 国家自然科学基金（批准号：50371012）和辽宁省科学技术基金（批准号：20032125）资助 的课题. |
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| 摘 要： | 通过对镍粉填充RTV硅橡胶的电阻率的测量确定了镍基导电硅橡胶的渗滤值点. 在此基础上 添加不同含量的炭黑，发现了有别于单一导电填料填充两相体系的渗滤值规律，即二次渗滤 现象. 根据导电机理模型推测了二次渗滤现象产生的原因，并对实验结果进行了拟合. 同时 针对高导电硅橡胶的屏蔽性能，发现可用Schelkunoff理论较好地描述其屏蔽效果. 结合二 次渗滤现象，分析了其对屏蔽性能的影响.关键词：镍粉渗滤阈值二次渗滤现象导电机理
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| 关 键 词： | 镍粉 渗滤阈值 二次渗滤现象 导电机理 |
| 文章编号： | 1000-3290/2005/54(07)3332-05 |
| 收稿时间： | 2004-09-10 |
Influence of double-percolation phenomenon on shielding effectiveness of Ni-based conductive silicone rubber |
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| Li Peng,LIU Shun-hua,Chen Guang-Yun. Influence of double-percolation phenomenon on shielding effectiveness of Ni-based conductive silicone rubber[J]. Acta Physica Sinica, 2005, 54(7): 3332-3336 |
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| Authors: | Li Peng LIU Shun-hua Chen Guang-Yun |
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| Abstract: | By measuring the electrical resistivity of RTV silicone rubber with Ni powder, t he percolation threshold of Ni-based conductive silicone rubber was determined. When N234 was filled in Ni-based conductive silicone rubber,double-percolation p henomenon was found other than percolation law. After fitting of the experimenta l results,the mechanism of the double-percolation phenomenon was presumed. As fo r the shielding effectiveness of high conductive silicone rubber, the result sh ows that it can be described well with the Schelkunoff theory.The influence of double-percolation phenomenon on shielding effectiveness of the rubber was investigated. |
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| Keywords: | nickel powder percolation threshold double-percolation phenomeno n conductive mechanism |
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