The Characteristics of Single Stripe Surface Dielectric Barrier Discharge with Solid Powder

Surface dielectric barrier discharge (SDBD) plasma was generated with alumina powder on an SDBD electrode. Because of the higher dielectric constant of solid powder, a higher electric field is applied in the pores created by the powder particles. Depending on the powder particle sizes and gas species, the power consumption and total capacitance of the powder SDBD have characteristic trends. As the powder particle size decreases, the total volume of the discharge channels and consumed power at a given applied voltage decreased for helium (He) gas discharge; however, the opposite was observed for sulfur hexafluoride (SF6) gas discharge at atmospheric pressure. The consumed power decreased from 82.19 to 74.5 W with powder diameter decrement (no powder, 1, 0.1, and 0.01 mm) for He gas discharge at 10 kV and 1 kHz square voltage. However, for the SF6 gas discharge, the power increased from 17.86 to 49.07 W with 16 kV and 1 kHz square voltage. Therefore, the results of this study provide information regarding the characteristics of SDBD plasmas with porous dielectric media.