Abstract
The stability of the corona discharge is a significant factor in electrophotographic process. In this study, the influences of the relative humidity and temperature on the corona discharge and the characteristics of the initial behavior of the corona discharge are investigated. The voltage for maintaining corona current constant is monitored as a function of time. When the relative humidity increases, the voltage increase is observed on both polarity cases. The decrease of the ion mobility is considered to be the main factor to disturb the corona discharge. The corona discharge is promoted by the increase of the temperature. It is considered that the ionization is promoted in the both polarity cases. In the initial behavior of the corona discharges, the voltage decrease is observed in the positive case, and the voltage increase is observed in the negative case. From the voltage change, the mechanisms of the initial behavior of the corona discharge are considered as the promotion caused by the rise of the temperature of the discharge plasma area and the suppression by the generation of the ozone.
