The Promising of Tiles as Barrier on DBD with Narrow Gap and Produced Ozone

: The high voltage plasma that occurs in the air gap and in the dielectric barrier discharge (DBD) is caused by the high voltage stress the gas molecules to ionized gas molecules. DBD is also determined by the type of barrier made of materials with various dielectric constants. The power supply used in this study is a parallel resonant pushpull inverter using a flyback transformer. Five types of ceramics (K1, K2, K3, K4, and K5) and two types of granites (G1 and G2) as barriers were used in this study. The gap between the high voltage electrode and the barrier was 1.2 mm. The results showed that plasma with high light intensity is found in K3, K5, G1 and G2. Discharge current in G1 is higher than others. The highest discharge voltage occurs in the G1 with an air gap of 1.2 mm. K3, K5, K1 and K2 have better ozone concentrations than K1, K2 and K4. From the results of the calculation of the dielectrics used, all of them have a dielectric permittivity value of less than 15 and the relative permittivity of these ceramics affects the shape of the plasma, the light intensity of the plasma and the concentration of ozone produced. This type of granite as barrier that produces light intensity, plasma voltage, discharge current and the resulting ozone concentration is higher than the ceramic type.