• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.16 no.6
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• pp.119-125
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• 2002

The temperature decrease of discharge space was very important to generate the high concentration of ozone in silent discharge type ozone generator. At this time, binding materials and methods between dielectric barrier and ground electrode affected to the discharge importantly in electrical and thermal point of view. So, above two factors become very important parameters should be considered before designing the ozone generator. In this study, binders of silicone compound, electroconductive resin and charcoal were used for variations of binders properties. Resultantly, when the binding materials were used, better ozone generation characteristics were shown(maximum ozone generation 28044［ppmV］ at 6.0［kV］) in comparison with the non-used case (maximum ozone generation 15944［ppmV］ at 4.0［kV］). In addition, when the binding materials were used, the case of pure silicone compound showed better characteristics(maximum ozone generation 28044［ppmV］ at 6.0［kV］) than the cases of conductive binding materials(maximum ozone generation 25842［ppmV］ at 5.5［kV］ and including the charcoal 5%).

• Carbon letters
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• v.2 no.3_4
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• pp.165-169
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• 2001

Modification of C/C composite bipolar plate for improving electrical conductivity was carried out by addition of electroconductive carbon black (EC-CB). Carbon black was carefully mixed to methanol-containing phenolic resin, impregnated into 2D-carbon fabrics, hot pressed and then carbonized to obtain composite plate. Inclusion of electro-conductive carbon black enhanced the electrical conductivity of the C/C composites by increasing the conduction path. Addition of 10 vol% carbon black increased the electrical conductivity from 5.5/${\Omega}cm$ to 32/${\Omega}cm$ and reduced the crack formation by filling effect, resulting in the increase of flexural properties of composite plate. However, at carbon black content over 10 vol%, flexural properties decreased by delaminating role of excess carbon black at the interface in C/C composites.