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交联聚乙烯/α-氧化铝纳米复合材料的空间电荷与直流击穿行为研究

Investigation of the Space Charge and DC Breakdown Behavior of XLPE/α-AlO Nanocomposites.

作者信息

Guo Xiangjin, Xing Zhaoliang, Zhao Shiyi, Cui Yingchao, Li Guochang, Wei Yanhui, Lei Qingquan, Hao Chuncheng

机构信息

Institute of Advanced Electrical Materials, Qingdao University of Science and Technology, Qingdao 266042, China.

State Key Laboratory of Advanced Power Transmission Technology, Changping district, Beijing 102209, China.

出版信息

Materials (Basel). 2020 Mar 15;13(6):1333. doi: 10.3390/ma13061333.

DOI:10.3390/ma13061333
PMID:32183427
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7143762/
Abstract

This paper describes the effects of α-AlO nanosheets on the direct current voltage breakdown strength and space charge accumulation in crosslinked polyethylene/α-AlO nanocomposites. The α-AlO nanosheets with a uniform size and high aspect ratio were synthesized, surface-modified, and characterized. The α-AlO nanosheets were uniformly distributed into a crosslinked polyethylene matrix by mechanical blending and hot-press crosslinking. Direct current breakdown testing, electrical conductivity tests, and measurements of space charge indicated that the addition of α-AlO nanosheets introduced a large number of deep traps, blocked the charge injection, and decreased the charge carrier mobility, thereby significantly reducing the conductivity (from 3.25 × 10 S/m to 1.04 × 10 S/m), improving the direct current breakdown strength (from 220 to 320 kV/mm) and suppressing the space charge accumulation in the crosslinked polyethylene matrix. Besides, the results of direct current breakdown testing and electrical conductivity tests also showed that the surface modification of α-AlO nanosheets effectively improved the direct current breakdown strength and reduced the conductivity of crosslinked polyethylene/α-AlO nanocomposites.

摘要

本文描述了α-AlO纳米片对交联聚乙烯/α-AlO纳米复合材料中直流电压击穿强度和空间电荷积累的影响。合成了尺寸均匀且长径比高的α-AlO纳米片，对其进行了表面改性和表征。通过机械共混和热压交联将α-AlO纳米片均匀分布在交联聚乙烯基体中。直流击穿测试、电导率测试和空间电荷测量表明，添加α-AlO纳米片引入了大量深陷阱，阻挡了电荷注入，降低了载流子迁移率，从而显著降低了电导率（从3.25×10 S/m降至1.04×10 S/m），提高了直流击穿强度（从220 kV/mm提高到320 kV/mm），并抑制了交联聚乙烯基体中的空间电荷积累。此外，直流击穿测试和电导率测试结果还表明，α-AlO纳米片的表面改性有效提高了交联聚乙烯/α-AlO纳米复合材料的直流击穿强度并降低了其电导率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43f8/7143762/362aaf31267e/materials-13-01333-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43f8/7143762/362aaf31267e/materials-13-01333-g013.jpg

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