摘要
过去提高塑料电缆绝缘的介电强度,主要手段之一是改善聚合物的形态结构,本文报道另一种新途径,改善电极与介质界面的电荷陷阱特性。根据我们的聚合物击穿的陷阱理论,为了改善聚乙烯的介电强度,必须减少电荷陷讲过程中非辐射能量转移形成的热电子。作者在半导电屏蔽料中添加特殊成分,在试样和电极的热加工过程中,扩散到聚乙烯表面的薄层中,减少薄层中的深陷阱密度,破坏了树枝击穿的条件,大大提高了试样的介电强度和树枝起始电压。
In the pest, one of main measure for increasing the dielectric strength of insulationin plastic cable was to improve the morphology of polymer. A new approach that modifies the charge trap characteristic on the interface between the electrode and dielectric is reported in this Paper. A special ingredient is added by authers in the prescription of semiconductive materials for electrical shield. The addives diffuse in the polyethylene in the thermal process of sample and electrode and decrease the density ofdeetyrap in POlyethylene. So the condition of treeing breakdown is destroyed, the dielectric strength and treeing initiation voltage of sample enhance largely.
出处
《电工技术学报》
EI
CSCD
北大核心
1993年第4期46-51,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金
关键词
电缆
屏蔽层
电气强度
:New semiconductive material Electrical shield Cable
