聚合物样品老化过程中应力空间电荷探测

Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics Pub Date : 1989-07-03 DOI:10.1109/ICSD.1989.69158

T. Lebey, C. Laurent, C. Mayoux

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引用次数: 4

摘要

已知电荷注入发生在聚合物材料的预击穿阶段。最近已经证明，在双针电极配置和交流电压下，使用灵敏度约为=10/sup -14/ c的模拟实验装置，可以对这种电荷进行时间分辨测量。在两种聚合物材料(聚乙烯和环氧树脂)中定义了电荷注入的临界场。作者报告了交流极化过程中电荷随时间变化的数据。结果表明，聚合物在老化过程中存在连续的空间电荷注入现象。一些注入的载流子被永久地困在电介质中

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In stress space charge probing during ageing of polymeric samples

Charge injection is known to occur in the prebreakdown stage in polymeric materials. It has recently been demonstrated that a time-resolved measurement of this charge is possible in a double-needle electrode configuration and under AC voltage using an analog experimental setup with a sensitivity of approximately=10/sup -14/ C. A critical field for charge injection has been defined in two polymeric materials (polyethylene and epoxy resin). The authors report data on the temporal evolution of the charge during AC polarization. Results show that continuous space charge injection occurs during ageing of the polymeric samples. Some of the injected carriers are permanently trapped in the dielectric.<>

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Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics

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