High field AC conduction mechanism in nonpolar polymers
High field AC conduction mechanism in nonpolar polymers
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非极性聚合物中的高场交流传导机制
DOI：
10.1109/ceidp.1999.804600
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
A. Bulinski
中科院分区：
文献类型：
--
作者：
K. Tohyama;M. Nagao;M. Kosaki;S. Bamji;A. Bulinski
非极性聚合物，如聚乙烯和聚丙烯，广泛用作高压电缆和电容器的电绝缘材料。早先，据报道，在高温-高电场条件下占主导地位的导电性不依赖于所施加的交流电压的频率，在50 Hz至400 Hz的范围内。本文研究了交流电压下电致发光（EL）脉冲的频率特性。结果表明，在XLPE的EL脉冲发生在相同的相位角的交流电压，无论频率在60至900 Hz的范围内。由于从电极的载流子注入和空间电荷的形成，发生EL发射和导电性。此外，EL脉冲和耗散电流的峰值正好出现在所施加电压的正半周期和负半周期的峰值之前。根据这些结果，讨论了交流电压作用下交联聚乙烯的高场导电机理和空间电荷的影响。
Non-polar polymers, such as polyethylene and polypropylene, are widely used as electrical insulation for high voltage cables and capacitors. Earlier, it was reported that the conductivity, which is the dominant mechanism under high temperature-high electric field conditions, does not depend on the frequency of the applied ac voltage, in the range from 50 Hz to 400 Hz. In this paper, the frequency dependence of electroluminescence (EL) pulses under ac voltage is examined. It is shown that in XLPE the EL pulses occur at the same phase angle of the ac voltage, irrespective of the frequency in the range of 60 to 900 Hz. EL emission and conductivity occur due to carrier injection from the electrode and space charge formation. Also, the peaks of the EL pulses and the dissipation current occur just before the peaks of the positive and negative half-cycles of the applied voltage. From these results, the high field conduction mechanism and the effect of space charge in XLPE subjected to ac voltage is discussed.