不同界面状态的交联聚乙烯/三元乙丙橡胶双层介质电导特性研究

doi:10.11985/2018.11.009

摘要/Abstract

摘要：

本文测量了在30~90℃,1~19kV/mm下三种接触方式的交联聚乙烯/三元乙丙橡胶双层介质电导特性,分析了电场、界面以及温度对双层介质电导的影响机理。研究表明：随着电场升高,三种双层介质电导率的电场依赖性均随之升高;热压接触式双层介质电导率的温度敏感性强于其他两种物理接触界面的双层介质,温度对化学界面的影响比对物理界面的影响更大。双层介质电导存在类似半导体物理中PN结的极性现象,热压式接触双层介质电导率极性效应与另外两种双层介质相反。界面状态对双层介质的电导特性有着明显的影响。

关键词: 交联聚乙烯, 乙丙橡胶, 电导率, 温度, 界面

Abstract:

In this paper, the conductivity of double-layered XLPE/EPDM with three interface conditions were measured at 30~90℃ and the measuring electric field is from 1kV/mm to 19kV/mm. The influence factors of electric field, interface and temperature on conduction characteristics of double-layered dielectrics were analyzed. The results show that the electric field dependence of the conductivity of the three double-layered dielectrics increases as the electric field increases. The temperature sensitivity of the hot-contact double-layered dielectric conductivity is stronger than that of the other two dielectrics with physical interface, which means the influence of temperature on the conductivity of chemical interface is greater than that of physical interface. Besides, the double-layered dielectric conductivity has a polar effect similar to PN junction and polar effect of the conductivity of hot-contact double-layered dielectric is opposite to that of the other two double-layered dielectrics, which manifests the interface condition largely affects conduction characteristics of double-layered dielectrics.

Key words: Cross-linked polyethylene, Ethylene-propylene-diene monomer, conductivity, temperature, interface

中图分类号:

TM215

易姝慧,王亚林,吴建东,尹毅. 不同界面状态的交联聚乙烯/三元乙丙橡胶双层介质电导特性研究[J]. 电气工程学报, 2018, 13(11): 71-78.

Yi Shuhui,Wang Yalin,Wu Jiandong,Yin Yi. Research on Conduction Characteristics of Double-layered XLPE/EPDM with Different Interface States[J]. Journal of Electrical Engineering, 2018, 13(11): 71-78.

图/表 11

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参考文献 12

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双层介质接触方式	温度 /℃	斜率				阈值电场/(kV/mm)
		XLPE(-)		XLPE(+)		XLPE(-)	XLPE(+)
		J₁	J₂	J₁	J₂	E	E
直接接触	30	1.13	2.26	1.19	2.43	8.20	7.24
	50	1.37	2.44	1.57	2.93	7.19	8.26
	70	1.43	2.16	1.48	2.12	7.59	6.21
	90	1.58	2.03	1.97	1.58	7.18	8.28
硅脂接触	30	0.85	1.71	0.92	2.34	10.3	9.08
	50	0.81	1.93	0.92	2.52	8.66	7.12
	70	1.06	2.28	1.42	2.16	5.90	6.29
	90	1.39	2.34	1.43	1.94	3.59	3.35
热压接触	30	0.89	2.33	0.80	2.12	10.6	10.8
	50	1.17	2.25	0.93	2.86	9.90	10.2
	70	1.22	2.07	1.35	1.94	4.69	5.42
	90	1.62	2.24	1.34	1.92	3.73	4.03

类型	电场极性	电场强度 /(kV/mm)	活化能 ?/eV
直接接触式双层 XLPE/EPDM	-/XLPE/EPDM/+	3	0.87
		10	0.95
		19	0.91
	-/EPDM/XLPE/+	3	1.10
		10	1.14
		19	1.10
硅脂接触式双层 XLPE/EPDM	-/XLPE/EPDM/+	3	0.93
		10	1.09
		19	1.14
	-/EPDM/XLPE/+	3	0.95
		10	1.02
		19	0.96
热压接触式双层 XLPE/EPDM	-/XLPE/EPDM/+	3	1.32
		10	1.27
		19	1.39
	-/EPDM/XLPE/+	3	1.08
		10	1.18
		19	1.19

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