中国电机工程学报2012，Vol.32Issue(13)：138-143,6.
纳米SiO2／低密度聚乙烯复合介质的击穿特性
Breakdown Properties of Nano-SiO2/LDPE Composite
摘要
Abstract
The breakdown strength of polymer nanocomposite is related to the properties of nano-additive, such as doping concentration, particle size and surface treatment. Specimen with different doping concentration, particle size and particle surface treatment were made to test the breakdown strength under AC, positive DC and negative DC voltage, respectively. It is shown that in the context of this study, doping nano-SiO2 can increase the breakdown strength of low density polyethylene（LDPE）; and the breakdown strength of nano-SiO2/LDPE composite increases with the increasing of doping concentration. Under the same doping concentration, when particle size is between 12 nm and 16 nm, the breakdown strength of nanocomposite decreases with the increasing of particle size. When particle size is 7 nm, the breakdown strength is smaller than that of the bigger particle size, which is probably caused by the coalescence of 7nm nano-SiO2 particles. Besides, hydrophobic surface treatment of nano-SiO2 particles can enhance the breakdown strength of nanocomposite.关键词
低密度聚乙烯/氧化硅/纳米复合介质/击穿强度/威布尔（Weibull）分布Key words
low density polyethylene(LDPE)/silica/nanocomposite dielectrics/breakdown strength/Weibull distribution分类
信息技术与安全科学引用本文复制引用
兰莉,吴建东,纪哲强,王俏华,李酷,肖登明,尹毅..纳米SiO2／低密度聚乙烯复合介质的击穿特性[J].中国电机工程学报,2012,32(13):138-143,6.基金项目
国家自然科学基金项目（50877047）. （）
