为了揭示十二烷基苯中绝缘材料沿面闪络的发展过程，并研究有效提高脉冲功率装置绝缘爬电距离的方法，通过实验对不同脉冲前沿、不同电场形式下有机玻璃和尼龙6在负脉冲电压下的沿面闪络电压进行了测量。结果发现: 随着脉冲陡度的增加，沿面闪络电压增大; 随着沿面距离的增大，闪络电压升高，但闪络场强降低; 电场越不均匀，越容易发生闪络，并且在极不均匀场中，闪络距离较大时，闪络电压随沿面距离的增长趋势变缓，出现了明显的拐点。研究认为，液体介质中的沿面闪络与真空中的沿面闪络具有相似的闪络机制，沿面闪络是在气化的通道内完成的。

In order to reveal the developing progress of flashover in dodecylbenzene and study the effective methods to improve the creepage discharge of pulsed power devices, fashover voltage of polymethyl methacrylate and nylon6 were measured under negative pulse voltage through experiments at different pulse risetime and different electric form. Form the results of the experiments, it is found that the flashover voltage increases as impulse steepness increases. With the flashover distance increasing, the flashover voltage increases, but the flashover field strength decreases. The more nonuniform the electric field is, the more the flashover occurs, and if there is a large distance, flashover voltage has a slowing trend with flashover distance increasing in a very nonuniform field, and there is a clear inflection point. It is believed that they have similar flashover mechanism in vacuum and insulation oil and the flashover is completed in a gasifying path.