Flashover Voltage and Discharge Mechanism of Mixed Gases

点击翻译按钮获取中文摘要

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.