This paper is an experimental study of the electrical conduction of mineral-oil/solid interfaces in negative polarity. This study is performed in a point-plane configuration immersed in mineral oil submitted to impulse voltages. The interface is assembled with an inclined solid in contact with the point electrode tip. Charge recordings and conduction currents of different combinations of mineral-oil/solid interfaces are reported. Different polymers and oil-impregnated papers are used as the solid materials. It is found that for voltages lower than the inception voltage, the injection of charge belongs to a weak injection regime. The spatial limitation with solids of similar permittivity as the mineral oil decreases the charge injection. The charge injection at mineral-oil/solid interfaces follow two conduction current type characteristics. Experiments with mineral-oil/PTFE interface shows the existence of a transition between both conduction current types if the applied voltage is increased.

中文翻译：

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矿物-油/固体界面中负流注开始之前的导电电流

本文是对矿物-油/固体界面在负极性下导电的实验研究。这项研究是在浸入矿物油中并承受脉冲电压的点平面配置中进行的。该界面组装有与点电极尖端接触的倾斜固体。报告了矿物油/固体界面不同组合的电荷记录和传导电流。不同的聚合物和油浸纸用作固体材料。发现对于低于起始电压的电压，电荷注入属于弱注入状态。与矿物油具有类似介电常数的固体的空间限制减少了电荷注入。矿物油/固体界面处的电荷注入遵循两种传导电流类型特征。