交联聚乙烯热老化过程中的电性能  

Electrical Properties of XLPE in Thermal Aging Process

作　　者：刘露萍[1] 吕程[1,2] 

机构地区：[1]重庆水利电力职业技术学院,重庆402160 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《塑料》2016年第3期4-6,共3页Plastics

基　　金：中央高校基本科研基金(CDJZR15110216);重庆市教委科学技术资助项目(KJ1503702)

摘　　要：交联聚乙烯被广泛用于电工绝缘材料领域,研究其热老化过程中的电性能对于评估电缆等电气设备的使用寿命具有非常重要的实际意义。文章将交联聚乙烯放在150℃的条件下进行加速热老化,研究在老化过程中交联聚乙烯的击穿和介电性能。结果表明:交联聚乙烯在老化过程中击穿场强、体积电阻率都随老化时间的延长而降低;极化指数、介质损耗和相对介电常数都随老化时间的增加有较大的升高。XLPE was widely used in the field of electrical insulation materials, the research of the electrical performance of XLPE in the heat aging process was known as a very important practical significance for assessing cables and other electrical equipment service life. XLPE was accelerated thermal aging under 150 ℃ ,breakdown and dielectric properties of XLPE were studied in the aging process. The results showed that the breakdown field strength and the volume resistivity of XLPE were reduced with aging time increase. The polarization index, dielectric loss and relative dielectric constant of XLPE were great increased with aging time increase.

关 键 词：交联聚乙烯 热老化 击穿场强 介电常数 介电损耗 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]