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聚萘二甲酸丁二醇酯试样表面电荷迁移与消散机理

, PP. 36-40

Keywords: 聚萘二甲酸丁二醇酯(PBN),表面电荷,累积,迁移,消散,表面态

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Abstract:

采用静电探头对负直流高压下聚萘二甲酸丁二醇酯(PBN)表面电荷密度进行测量。结果表明,负电荷累积于介质表面,其主要来源于电极向介质的电荷注入,被表面态俘获后,形成表面电荷。随加压时间延长,电荷从高压电极侧向接地极迁移,表面平均电荷密度增大。电荷密度最大值出现在高压电极附近,最小值出现在接地极附近。在表面电荷消散初始阶段,电荷密度衰减速度快,随着消散时间延长,电荷密度衰减速度变慢。

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