Flashover Voltage and Discharge Mechanism of Mixed Gases

1.本文提出的利用玻尔兹曼方程给出的电子能量分布计算均匀电场中混合气体闪络电压的方法在一般情况下是成立的.通过实验研究，明确了混合气体的闪络电压与各组分气体闪络电压的关系。使用的气体<SF_6>是、<CCl_2><F_2><C_3><F_8><N_2><O_2>Ar和它们的二元混合物。从实验和理论上都证实了由两种闪络电压相近的负电性气体组成的混合气体的闪络电压具有协同效应，并且在混合比大于各组分气体的闪络电压时有最大值.对非均匀电场下混合气体中的放电机理进行了实验研究。在非均匀电场中，极少量的组分气体或杂质（如水蒸气）对放电现象有敏感的影响. <C_3>气体<F_6>被认为是帕邢定律不成立的一个罕见的例子。在紫外灯照射和不照射的情况下测量气体中的闪络电压。即使在均匀直流电压场中，无辐照时的闪络电压也远大于有辐照时的闪络电压。

1. A calculation method of flashover voltage of a mixed gas in uniform field using electron energy distribution given by Boltzmann equation, which we have proposed, was convinced in general cases.2. The relation between the flashover voltage of a mixed gas and the ones of the component gases were made clear by experimental investigation. Used gases are <SF_6> , <CCl_2> <F_2> , <C_3> <F_8> , <N_2> , <O_2> ,Ar and binary mixtures of them.3. It was both experimentally and theoretically convinced that the flashover voltages of a mixed gas composed of two electro-negative gases having nearly same flashover voltages show the character of synergism and have the maximum value at a mixing ratio which is larger than each flashover voltage of component gases.4. Some experiments were made to investigate the discharge mechanism in mixed gas in non-uniform field. In non-uniform field, very little amount of a component gas or impurities such as water vapor has a sensitive effect on discharge phenomena.5. <C_3> <F_6> gas is known as a rare example in which Paschen's law is not valid. Flashover voltages in the gas were measured with and without irradiation by ultra-violet lamp. The flashover voltages without irradiation was much larger than the one with it even in unform field of DC voltage.