CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Abnormal Polarity Effects of Streamer Discharge in Propylene Carbonate under Microsecond Pulses |
Hong-Wei Liu1, Yan-Pan Hou1, Zi-Cheng Zhang1**, Jian Xu2 |
1College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 2Chongqing Communication Institute, Chongqing 400035
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Cite this article: |
Hong-Wei Liu, Yan-Pan Hou, Zi-Cheng Zhang et al 2017 Chin. Phys. Lett. 34 077701 |
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Abstract Propylene carbonate (PC) has a great potential to be used as an energy storage medium in the compact pulsed power sources due to its high dielectric constant and large resistivity. We investigate both the positive and negative breakdown characteristics of PC. The streamer patterns are obtained by ultra-high-speed cameras. The experimental results show that the positive breakdown voltage of PC is about 135% higher than the negative one, which is abnormal compared with the common liquid. The shape of the positive streamer is filamentary and branchy, while the negative streamer is tree-like and less branched. According to these experimental results, a charge layer structure model at the interface between the metal electrode and liquid is presented. It is suggested that the abnormal polarity effect basically arises from the electric field strength difference in the interface between both electrodes and PC. What is more, the recombination radiation and photoionization also play an important role in the whole discharge process.
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Received: 30 December 2016
Published: 23 June 2017
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PACS: |
77.22.Jp
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(Dielectric breakdown and space-charge effects)
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52.80.Wq
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(Discharge in liquids and solids)
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51.50.+v
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(Electrical properties)
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Fund: Supported by the National Natural Science Foundation of China under Grant No 51677190, and the Hunan Provincial Natural Science Foundation of China under Grant No 2017JJ1005. |
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