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陷阱参数对纳米改性绝缘纸板介电特性影响的实验研究

Experimental Study on Influence of Trap Parameters on Dielectric Characteristics of Nano-Modified Insulation Pressboard.

作者信息

Chen Qingguo, Liu Heqian, Chi Minghe, Wang Yonghong, Wei Xinlao

机构信息

Key Laboratory of Engineering Dielectric and its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150040, China.

出版信息

Materials (Basel). 2017 Jan 22;10(1):90. doi: 10.3390/ma10010090.

DOI:10.3390/ma10010090
PMID:28772448
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5344543/
Abstract

In order to study the influence of trap parameters on dielectric characteristics of nano-modified pressboards, pressboards were made using the nano doping method with different nanoparticle components. The dielectric characteristics of the modified pressboards were measured, and the trap parameters were investigated using the thermally stimulated current (TSC) method. The test results indicated that the conductivity initially declined and then rose with the increase of nano-Al₂O₃ content, whereas it solely rose with the increase of nano-SiC content. Moreover, the conductivity exhibited nonlinear characteristics with the enhancement of electric field stress at high nanoparticle content. The relative permittivity of modified pressboard declines initially and then rises with the increase of nanoparticle content. In addition, the breakdown strength of modified pressboards exhibited a pattern of incline followed by decline with the increase of nano-Al₂O₃ content, while it always declined with the increase of nano-SiC content. The analysis based on the energy band theory on trap parameters of the constructed multi-core model concludes that the nanoparticle components added in pressboard altered both the depth and density of traps. It is therefore concluded that trap parameters have significant influence on the dielectric characteristics of nano-modified insulation pressboard.

摘要

为了研究陷阱参数对纳米改性绝缘纸板介电特性的影响，采用纳米掺杂法制备了具有不同纳米颗粒成分的绝缘纸板。测量了改性绝缘纸板的介电特性，并采用热刺激电流（TSC）法研究了陷阱参数。测试结果表明，随着纳米Al₂O₃含量的增加，电导率先下降后上升，而随着纳米SiC含量的增加，电导率仅上升。此外，在高纳米颗粒含量下，随着电场应力的增强，电导率呈现非线性特性。改性绝缘纸板的相对介电常数随着纳米颗粒含量的增加先下降后上升。另外，随着纳米Al₂O₃含量的增加，改性绝缘纸板的击穿强度呈现先上升后下降的趋势，而随着纳米SiC含量的增加，击穿强度始终下降。基于能带理论对构建的多核模型陷阱参数进行分析得出，绝缘纸板中添加的纳米颗粒成分改变了陷阱的深度和密度。因此得出结论，陷阱参数对纳米改性绝缘纸板的介电特性有显著影响。

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