オソナイザー放電のための琺瑯電極の作製

概要

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A Slip mixture containing an oxide ceramic powder was coated on the copper electrodes as a dielectric layer for ozonizing discharge by a processing technique for vitreous enamel, and a prototype ozonizer was constructed with these electrodes. Pb(Zr_<0.53>Tio_<0.47>)O_3, BaZrO_3, PbTiO_3, and BaTiO_3, were examined as an oxide. It was found that both generated ozone gas concentration and ozonizing efficiency increased with increasing dielectric constant of dielectric layer. In particular, an ozonizer with a dielectric layer of 30 wt% BaTiO_3 worked well, that is, ozone concentration in ozonized air was 170 ppm and calculated ozonizing efficiency was 13 gO_3/kWh under the conditions of driving voltage=5 kV, A. C. frequency=5 kHz, and air flow rate=501/min. As a result of continuous running test, the gas concentration of ozone generated was 160±10 ppm and the temperature of electrodes was 42±5℃, and they remained stabaly for more than 2 weeks.
社団法人日本セラミックス協会の論文
1990-09-01