Space charge dynamics in LDPE films immediately before breakdown
Space charge dynamics in LDPE films immediately before breakdown
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DOI：
10.1109/94.919963
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发表时间：
2001-04
影响因子：
3.1
通讯作者：
M. Fukuma;K. Fukunaga;T. Maeno
中科院分区：
文献类型：
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作者：
M. Fukuma;K. Fukunaga;T. Maeno
用脉冲电声（PEA）方法观察了低密度聚乙烯（LDPE）薄膜在不同温度下击穿时的空间电荷动力学。为了研究固有的电击穿，施加的电场在150 ms内增加到300 kV/mm，并保持恒定，直到样品击穿，或最长300 ms。以1 ms间隔测量空间电荷分布。仅在90/spl deg/C下击穿之前立即观察到传播到样品中的显著正电荷。这些测量结果表明，正电荷的行为是强烈相关的击穿现象。
Space charge dynamics in low-density polyethylene (LDPE) films were observed by the pulsed electroacoustic (PEA) method during breakdown tests at various temperatures. In order to investigate the intrinsic electrical breakdown, the applied electric field was increased to 300 kV/mm in 150 ms, and kept constant until breakdown of the specimens, or 300 ms at the longest. Space charge profiles were measured at 1 ms intervals. A significant positive charge propagating into the sample was observed only immediately before the breakdown at 90/spl deg/C. These measurements revealed that the positive charge behavior is strongly related to the breakdown phenomena.