Investigation of dielectric barrier discharge dependence on permittivity of barrier materials

It has been evidenced by both theory and experiments that a barrier possessing a high permittivity can create a high energy for dielectric barrier discharge. However, this argument was challenged by the recent experiments of the authors. They found an optimum permittivity value to generate denser and stronger microdischarges, as well as a high reactivity of destruction CO ₂ in the entire gap space for plasma chemistry. When the barrier permittivity was higher than this optimum value, the microdischarges became sparser and even extinguished since the large number of charges resulted from higher permittivity accumulated on the dielectric surface to reduce the electric field.