Title :
Effects of additives on prebreakdown phenomena in n-hexane
Author :
Nakao, Y. ; Itoh, H. ; Hoshino, S. ; Sakai, Y. ; Tagashira, H.
Author_Institution :
Dept. of Electr. & Electron. Eng., Muroran Inst. of Technol., Japan
Abstract :
Breakdown phenomena in n-hexane are observed in detail for positive and negative polarities by using a high-speed schlieren technique and an LED (light emitting diode) current measuring system, where an impulse voltage-(1.1/225 μs) is applied to a point-to-plane electrode gap. The effects of several additives on the streamer propagation are investigated. In particular, the effects of electron-trapping additives on the negative streamer propagation and of low-ionization-potential additives on the positive streamer propagation are examined. Correlation between the shape and the propagation velocity of streamers is also discussed. The propagation of positive streamers found to accelerate in the presence of additives which have a low ionization potential, whereas the negative streamer velocities increase in the presence of additives which have a large electron-trapping cross-section
Keywords :
organic compounds; LED; additives; current measuring system; electron-trapping additives; electron-trapping cross-section; high-speed schlieren technique; impulse voltage; low ionization potential; low-ionization-potential additives; n-hexane; negative polarities; negative streamer propagation; negative streamer velocities; point-to-plane electrode gap; positive polarity; positive streamer propagation; positive streamers; prebreakdown phenomena; propagation velocity; streamer propagation; Additives; Breakdown voltage; Current measurement; Dielectric liquids; Electric breakdown; Electrodes; High speed optical techniques; Ionization; Light emitting diodes; Shape;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids,1993., ICDL '93., IEEE 11th International Conference on
Conference_Location :
Baden-Dattwil
Print_ISBN :
0-7803-0791-7
DOI :
10.1109/ICDL.1993.593977
