吸湿对MgO/LDPE纳米复合材料空间电荷性能的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI:10.1109/CEIDP.2013.6748257

J. Yang, X. Wang, C. Zheng, H. Zhao, Q. Lei

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引用次数: 1

摘要

为了解氧化镁(MgO)/ LDPE纳米复合材料受潮后空间电荷性能的变化规律及其机理，研究了湿态LDPE和MgO/LDPE的吸湿重量和空间电荷性能。实验结果表明，吸湿对MgO/LDPE纳米复合材料的介电性能有较大影响。纳米复合材料在40%相对湿度条件下暴露一周后，在20kV/mm以上的高电场下，复合材料的空间电荷性能比干燥的MgO/LDPE明显降低。认为吸湿可能导致原有界面电荷分布的减弱。相反，在低电场条件下，MgO/LDPE体系对吸收水分引起的附加载流子迁移表现出较强的抑制作用。

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Influence of moisture absorption on space charge property of MgO/LDPE nanocomposite

In order to understand the change rule and its mechanism for the space charge property of Magnesium oxide (MgO)/ LDPE nanocomposites after damp, the moisture absorption weight and space charge properties of wet LDPE and MgO/LDPE were studied. Experiments results show that moisture absorption has a strong influence on dielectric properties of MgO/LDPE nanocomposite. After nanocomposite had been exposed for a week under the 40% relative humidity conditions, the improved space charge property of the composite at high electric field above 20kV/mm, were decreased obviously compare to dry MgO/LDPE. It is believed that moisture absorption may lead to a weakening of original interfacial charge distribution. On contrary, at low electric field, the MgO/LDPE system showed the strong suppression effect of aditional carriers migration caused by absorbed moisture.

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2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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