Electrical Conduction and Breakdown in Liquid Dielectrics
Electrical Conduction and Breakdown in Liquid Dielectrics
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液体电介质的导电和击穿
DOI：
10.1088/0370-1301/66/2/304
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发表时间：
1953
期刊：
影响因子：
--
通讯作者：
K. Macfadyen
中科院分区：
文献类型：
--
作者：
D. W. Goodwin;K. Macfadyen
已使用持续时间在0.2和20微秒之间的矩形电压脉冲进行了纯化的有机液体的击穿强度的测量。阴极金属、γ辐射以及脉冲宽度、电极间距、温度、液体组成等的变化的影响导致了击穿理论，根据该理论，由于阴极的电子发射和由于电极之间的离子运动引起的场畸变而产生不稳定性。传导测量支持这样的观点，即强场通过阴极的场发射以及通过电子碰撞的液体分子的电离产生传导。该击穿理论解释了击穿强度对电极间距、阴极金属和脉冲持续时间的依赖性。提出了击穿强度与温度和液体组成的关系。
Measurements of the breakdown strength of purified organic liquids have been made using rectangular voltage pulses of duration between 0.2 and 20 microseconds. The effects of cathode metal, γ-radiation and of changes in pulse duration, electrode separation, temperature, constitution of the liquid, etc. lead to a theory of breakdown according to which an instability arises as a result of electron emission from the cathode and field distortion due to the movement of ions between the electrodes. Conduction measurements support the view that strong fields produce conduction by field emission from the cathode, together with ionization of the liquid molecules by electron collisions. This theory of breakdown accounts for the dependence of breakdown strength on electrode separation, cathode metal and pulse duration. It also suggests the relationship between breakdown strength and the temperature and constitution of the liquid.