Abstract
The electrical breakdown phenomena in mixtures of cyclohexane and carbon tetrachloride for point-to-plane electrode configuration have been investigated using a photo optical current measuring system and a 760 ns rectangular high-voltage pulse generator. Discharges from positive points generally were more intense and faster than those from negative points. The time lag was precisely measured from the prebreakdown current. The average velocity of streamer propagation is estimated from the linear relation between formative time lag and gap spacing. The propagation velocity for a negative point in cyclohexane is exceedingly increased by a small amount of carbon tetrachloride as an additive, more extremely than that for a positive point. An polarization effect and a space charge effect on ionization of liquid molecule in the prebreakdown process are proposed to account for the additive effect.
