高电压技术2012，Vol.38Issue(10)：2691-2697,7.
纳米粒子改性聚乙烯直流电缆绝缘材料研究（Ⅰ）
Modified Low Density Polyethylene by Nano-fills as Insulating Material of DC Cable(Ⅰ)
摘要
Abstract
When HVDC cable is loaded in service,temperature gradient across the cable thickness will lead to field distortion greatly at the outer surface of insulation.In this paper,we adopted a special kind of nano particle as fillers to prepare pure low density polyethylene(LDPE) and three kinds of nanocomposite with filler fraction of 1%,3%,and 5%,respectively.The surface morphology was observed by scanning electron microscopy(SEM) to prove that nano fillers were dispersed evenly.Space charge accumulation and electrical field distribution under temperature gradient were measured by the pulsed electro-acoustic(PEA) method,and the volume resistivity and DC breakdown strength of the LDPE nanocomposite were measured under different temperatures.The results show that addition of the nano fillers can effectively reduce the space charge accumulation and field distortion under temperature gradient in LDPE,and improve the DC breakdown strength.Furthermore,the volume resistivity of the LDPE nanocomposite increases at first and then decreases as temperature increasing.关键词
纳米复合材料/温度梯度/空间电荷/体积电阻率/直流击穿场强/低密度聚乙烯（LDPE）Key words
nanocomposite/temperature gradient/space charge/volume resistivity/dc breakdown strength/low density polyethylene(LDPE)分类
化学化工引用本文复制引用
陈曦,吴锴,王霞,成永红,屠德民,秦楷..纳米粒子改性聚乙烯直流电缆绝缘材料研究（Ⅰ）[J].高电压技术,2012,38(10):2691-2697,7.基金项目
高等学校科技创新工程重大项目培育资金 （）
国家自然科学基金 （）
