纳米碳化硅/硅橡胶复合物介电性研究  

Research on the Dielectric Characteristics of Nano-SiC/Silicone Rubber Composites

作　　者：王飞风 张沛红[1] 高铭泽[1] 

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《哈尔滨理工大学学报》2015年第3期82-85,共4页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51277044)

摘　　要：制备了质量分数分别为1%、2%、3%、4%、5%、6%和7%的纳米碳化硅/硅橡胶复合物,利用宽频介电谱测试仪测试了不同碳化硅含量的纳米碳化硅/硅橡胶复合物的介电谱特性.结果表明:纳米碳化硅/硅橡胶复合物的介电常数在室温下随碳化硅含量的增加而增加,且在频率小于1Hz时,复合物的介电常数小于纯硅橡胶的介电常数.当频率小于50Hz时,复合物的介质损耗角正切随碳化硅含量的增加而降低,当频率大于1k Hz,复合物的介质损耗角正切随碳化硅含量的增加而增加.同时研究了纳米碳化硅/硅橡胶复合物的击穿特性,通过交流击穿试验可知,纳米碳化硅/硅橡胶复合物的击穿场强随纳米碳化硅含量的增加先增加后降低,当碳化硅质量分数为3%时,击穿场强出现最大值.In this paper, 1%, 2%, 3% 4% , 5% , 6% and 7% nano-silicon carbide/silicone rubber com- posites are prepared, and the dielectric spectroscopy properties of the composites are measured by broadband die- lectric spectroscopy tester. The results show that, at room temperature, the permittivity of the composites increases with the increase of silicon carbide content at all test frequency, and at the frequency of below 1 Hz, it is less than that of pure silicone rubber. The tan8 of the composites decrease with the increase of silicon carbide content at the frequency of below 50Hz, and increase with the increase of silicon carbide content at the frequency of above 1 kHz. The AC breakdown behavior of different loading of the composites is investigated. It can be found that with the in- crease of silicon carbide content, the breakdown strength of composites increases first and then decreases. When the silicon carbide content is 3wt%, the breakdown strength of the composites reaches its maximum value.

关 键 词：纳米碳化硅硅/橡胶复合物 介电谱特性 击穿特性 

分 类 号：TM215[一般工业技术—材料科学与工程]