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The Effect of Antioxidant and Graphite Nanoplatelet on DC  Breakdown and Space Charge of Crosslinked Polyethylene(PDF)

《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

Issue:
2018年04期
Page:
7-11
Research Field:
电气与电子工程
Publishing date:

Info

Title:
The Effect of Antioxidant and Graphite Nanoplatelet on DC  Breakdown and Space Charge of Crosslinked Polyethylene
Author(s):
ZHANG Cheng-cheng1WANG Jin-hui1JING Zi-ang1YAN Zhi-yu1HAN Bao-zhong12
1.Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China;
2.Shanghai Qifan Cable.Limited by Share Ltd., Shanghai 201514, China
Keywords:
Keywords:XLPE antioxidant GNPs DC breakdown strength space charge
PACS:
TM855
DOI:
10.15938/j.jhust.2018.04.002
Abstract:
 Abstract:To study the effect of antioxidant and graphite nanoplatelets (GNPs) on the direct current (DC) dielectric properties of crosslinked polyethylene (XLPE), antioxidant/XLPE and GNPs/antioxidant/XLPE composites were prepared by melt blending method. The DC breakdown strengths of the composites at different temperatures were tested and the experimental phenomena were analyzed and verified by experiments. The space charge distributions in the composites were also tested using the pulsed electroacoustic method. The experimental results indicated that adding different kinds of antioxidants would reduce the DC breakdown strength of XLPE, and the DC breakdown strength would further reduce after GNPs were added in. But the addition of GNPs would reduce the effect of temperature on the DC breakdown strength of composites, which was because GNPs could reduce the conductivity of the composites and the temperature dependency, reducing the probability of thermal breakdown. The space charge in XLPE would increase by adding antioxidant, but the addition of a certain amount of GNPs would improve the distribution of space charge in antioxidant/XLPE composites and the accumulation of space charge in the composites was obviously suppressed when the amount of GNPs was 1.5phr (adding 1.5g GNPs to every 100g XLPE). GNPs can reduce the depth and density of the traps in the composites, thus effectively restraining the accumulation of space charge in the composites.

References:

 

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Last Update: 2018-10-24