全氟聚醚中预击穿飘带的起源和结构

10th International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1990-09-10 DOI:10.1109/ICDL.1990.202938

C. Fenimore, K. Stricklett, H. Yamashita, H. Kawai, E. Forster, M. Pompili

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引用次数: 7

摘要

对全氟聚醚进行了电气测量，以确定这类材料作为液体电介质的适用性。在电脉冲应力下，测量了击穿强度和流线起始电压。击穿强度几乎与极性无关。在高倍摄影下，阴极起源的流线可以看到亚音速模式的生长。向快速生长过渡的时间和空间尺度比液态烃短。这种材料的气相电学性质和高汽化热被认为是这种行为的机制。

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The inception and structure of prebreakdown streamers in perfluorinated polyethers

Electrical measurements of perfluorinated polyethers were performed to determine the suitability of this class of material as a liquid dielectric. Measures of the breakdown strength and streamer inception voltage are obtained under electrical impulse stress. The breakdown strength is nearly independent of polarity. Under high magnification photography the cathode-originated streamers are seen to have a subsonic mode of growth. The transition to fast growth occurs on time and spatial scales shorter than those found in liquid hydrocarbons. The gas-phase electrical properties and the high heat of vaporization of this material are considered as mechanisms for this behavior.<>

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10th International Conference on Conduction and Breakdown in Dielectric Liquids

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