A large gap of Ar and mixed gas at atmospheric pressure RF-DBD glow discharges

In this study, a large gap of the distance between electrodes (>5.5 mm) of Ar atmospheric pressure glow discharge (APGD) in radio frequency dielectric barrier discharges (RF-DBD) is achieved. The I-V characteristic and I-phase angle characteristic of RF-DBD are studied in detail. The discharge characteristic of Ar mixed with N₂, O₂ and air, respectively, was diagnosed by the optical emission spectrum. The Lissajous plot was measured to calculate the effective power of the discharges. It is obtained that the mixture gas ratio in RF-DBD is seriously affected the discharge stability and the discharge mode. It concludes that this adjustable manufacture of the RF-DBD is capable in wide applications for material modifications and polymerizations.