Appearance of stable glow discharge in air, argon, oxygen and nitrogen at atmospheric pressure using a 50 Hz source

Abstract

Unusual glow discharges in air, argon, oxygen and nitrogen at atmospheric pressure can be produced using a 50 Hz source. This technique is introduced on the basis of the idea of a lower dielectric breakdown voltage gas. The electrode system, which is composed of a fine metal wire mesh of specified radius and a dielectric substance, is very useful for plasma surface processes and for chemical reactions in the plasma bulk. The observations of the Lissajous figure of voltage-electric charges and of the current pulse shapes are proposed as a method of distinguishing between the atmospheric pressure glow plasma and the silent electric discharge.

Generation of a Homogeneous Glow Discharge: A Comparative Study between the Use of Fine Wire Mesh and Perforated Aluminium Electrodes

“…The 3.0 mm gap spacing between the dielectric plates was about the maximum at which a stable glow discharge could be produced, and beyond this the glow was unstable and as found in previous work [S Okazaki, 1993;J Tepper, 2002;S Kanazawa., 1988] tended to develop into a filamentary discharge. Similarly, the stability of the discharge depends on the voltage applied the reactor, and the maximum voltage at which a stable discharge could be maintained was 1.6 kV and 3.6 kV, for spacing of the wire mesh electrodes of 1.5 mm and 3.0 mm respectively.…”

“…The voltage-charge Lissajous figures [S Okazaki, 1993] were obtained using the circuit of Fig. 6(a) demonstrate that at 1.2 kV a pure glow discharge is produced.…”

“…In general, a glow discharge is only stable at pressures of less than a few mbars [S Okazaki, 1993;J Tepper, 2002]. At atmospheric pressure the discharge is normally unstable, and in most cases it tends to change to a filamentary discharge, [F Massines, 1998;J Tepper, 2000;S Kanazawa., 1988], depending on the feed gas, the material of the dielectric barrier, the structure of the discharge electrode, the frequency of the pulsed supply, the gap spacing and the humidity of the gas.…”

“…Another important result relating to the stabilization of an atmospheric pressure glow discharge (APGD) is its appearance in air, argon and oxygen when using a 50 Hz source and a fine wire mesh as the discharge electrodes [S Okazaki, 1993]. These initial experiments have since been confirmed [J Tepper, 2000;T Yokoyama, 1990], and it has also been established that fine mesh electrodes produce a more stable glow than do coarse mesh electrodes [J Tepper, 2002].…”

Low Friction Property of Diamond-Like Carbon Coating Films and Oxygen Transmission Ratio of Amorphous Carbon Films Deposited by Advanced Coating Processes

“…Dielectric barrier discharge technology was developed by Okazaki et al, 34) and was applied widely in the surface improvement filed. Furthermore the film deposition process used by dielectric barrier discharge has still been developed.…”