Breakdown Voltage of CO2 at Temperatures around 4000 K and in Range from 300 to 700 K

Abstract

The breakdown voltage of high temperature CO2 was measured at temperatures around 4000 K and in the temperature from 300 to 700 K at an absolute pressure of 0.1 MPa. A voltage was applied to the high temperature CO2 through a set of two rod electrodes made of stainless steel with a diameter of 2 mm. The gap length between the electrodes was adjusted to be of 1 mm. The breakdown voltage of the hot CO2 proved to decrease in inverse proportion to the increase in temperature, in the range from 300 to 700 K. Further increase in temperature of the CO2 reduced the breakdown voltage more markedly. For example, at 4000 K the breakdown voltage was measured to be of 55 V. This breakdown voltage is only 1.1% of that at room temperature. © 2005, The Institute of Electrical Engineers of Japan. All rights reserved.