Dependence of filler size on space charge formation in LDPE/MgO under high electric field at high temperature

T. Maezawa, Y. Kishi, Y. Tanaka, T. Takada, Y. Murata, Y. Sekiguchi, M. Goshowaki
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引用次数: 9

Abstract

Space charge behavior has been investigated in LDPE/MgO composite films including the different size of MgO particles with a diameter of several tens nm (nano) or a few mum (micro) when a dc high stress is applied to the sample at high temperature. It is believed that a positive packet-like charge is injected from the anode, and after that a negative packet charge is injected from the cathode. In the samples with relatively low content of MgO, the apparent velocity of positive packet-like charge in LDPE/MgO (nano) is faster than that in LDPE/MgO (micro) at a field of 150 kV/mm. Such generation of charges causes the enhancement of local electric field in the sample. However, almost no packet-like charge was observed in the sample with relatively high content of MgO irrespective of the filler size. It is considered that the addition of MgO filler to LDPE plays a role to reduce the enhancement of the electric field in the sample by suppression of both the positive and the negative charge injection into the sample.
高温高电场作用下LDPE/MgO填料尺寸对空间电荷形成的影响
研究了在高温下施加直流高应力时,LDPE/MgO复合薄膜的空间电荷行为,包括直径为几十纳米(纳米)或几微米(微)的不同尺寸的MgO颗粒。一般认为,一个正的包状电荷从阳极注入,然后一个负的包状电荷从阴极注入。在MgO含量相对较低的样品中,在150 kV/mm的电场下,LDPE/MgO(纳米)中的正包状电荷的表观速度比LDPE/MgO(微)中的快。这种电荷的产生使样品中的局部电场增强。然而,无论填料尺寸如何,在MgO含量相对较高的样品中几乎没有观察到包状电荷。认为在LDPE中加入MgO填料可以抑制样品中的正电荷和负电荷注入,从而降低样品中的电场增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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