静电防护用典型气体的放电特性及其机理

Aiming at the problem of electrostatic discharge in the process of production, storage, transportation and use of explosives, the electrostatic breakdown characteristics of air, carbon dioxide and helium under three temperature conditions of 0, 20, 40℃ and the pressure range between 0.05 and 0.15 MPa are studied to find a feasible way to suppress the excessively high electrostatic discharge voltage, and the electrostatic breakdown energy is calculated and compared. The results show that the electrostatic breakdown voltage of the three gases increases with the increase of the pressure. The electrostatic discharge voltage and energy of carbon dioxide are the highest under the same condition, while the discharge voltage of helium is the lowest among the three gases; with the increase of temperature, the electrostatic breakdown voltage of the three gases decreases, and the electrostatic breakdown voltage of the three gases reaches the minimum at 40℃ and 0.05 MPa. Therefore, an environment with low pressure, higher temperature, and low breakdown field strength should be selected as the electrostatic protection atmosphere environment. These research results may serve as data basis and theoretical support for selection of protective atmosphere environment in the production process of explosives.