High Ozone Generation with a High-Dielectric-Constant Material

An optimum-dielectric-constant material with a fixed size was experimentally obtained for high ozone generation in a parallel-plate barrier discharge. The ozone production rate as a function of dielectric constant was found to depend strongly on discharge voltage. The ozone production rate for strontium titanium oxide (SrTiO 3 ) with high dielectric constant of approximately 300 was the highest among various existing dielectric materials under low discharge voltage (root-mean-square value) of 1.2 kV, while for titanium oxide (TiO 2 ) with dielectric constant of about 100, the highest ozone production efficiency was obtained at a wide range of discharge power and/or ozone concentration.