Electrical Breakdown and Dielectric Recovery of Propylene Carbonate
Electrical Breakdown and Dielectric Recovery of Propylene Carbonate
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DOI：
10.1109/tps.2006.876512
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发表时间：
2006-10
影响因子：
1.5
通讯作者：
S. Xiao;J. Kolb;M. Malik;Xinpei Lu;M. Laroussi;R. Joshi;E. Schamiloglu;K. Schoenbach
中科院分区：
文献类型：
--
作者：
S. Xiao;J. Kolb;M. Malik;Xinpei Lu;M. Laroussi;R. Joshi;E. Schamiloglu;K. Schoenbach
极性液体的特征在于高介电常数和高介电强度。这些特性使它们成为高能量存储系统和高功率开关介质的吸引力来源。大多数关于电击穿和恢复的研究都集中在水作为脉冲功率系统中的开关介质上。研究了碳酸丙烯酯（C4 H6 O3）作为水的替代物的击穿和介电恢复特性。碳酸亚丙酯相对于水的一个优点是其-55 ℃的相对低的冷冻温度，这允许其在高海拔使用。碳酸丙烯酯的介电常数为65，略小于水（81）。它的介电强度为200纳秒的脉冲持续时间测量为2.2 MV/cm，高于水（1.5 MV/cm）。在这两种情况下，电导率的非线性增加以上的电场为1.225 MV/cm，假设是由于场增强解离，记录。碳酸丙烯酯的回收与水的回收类似，具有等离子体衰减、冲击波发射和蒸气泡形成，除了最后一个阶段，其由化学反应决定：聚丙烯聚合物的产生和衰减。这将碳酸丙烯酯开关的介电恢复时间限制为大于10 ms的值
Polar liquids are characterized by high permittivity and high dielectric strength. These properties make them appealing dielectrics for use in high-energy storage systems and as high-power switching media. Most of the studies on electrical breakdown and recovery have focused on water as a switch medium in pulsed-power systems. As an alternative to water, the authors have studied the breakdown and dielectric recovery of propylene carbonate (C4H6O 3). One advantage of propylene carbonate over water is its relatively low freezing temperature of -55degC, which allows its use at a high altitude. The permittivity of propylene carbonate is 65, somewhat less than water (81). Its dielectric strength for pulses of 200-ns duration was measured as 2.2 MV/cm, higher than that of water (1.5 MV/cm). A nonlinear increase in conductivity above electric fields of 1.225 MV/cm, assumed to be due to field-enhanced dissociation, was recorded in both cases. The recovery of propylene carbonate is similar to that of water, with plasma decay, shock-wave emission, and vapor bubble formation, except for the very last phase, which is determined by chemical reactions: the generation and decay of polypropylene polymers. This limits the time for dielectric recovery of propylene carbonate switches to values of more than 10 ms