Abstract
The stability and uniformity of corona discharge are significant in the electrophotographic process. The corona discharge is easily affected by the state of the wire surface and environment. The discharges were occurred at 1 hour, 3 hours, 10 hours and 20 hours. The morphology of the products grown on the wire surfaces was investigated. With an increase of the discharge time, the needle crystals, instead of the spots grow on the wire surfaces in the positive cases. On the other hand, a large amount of projections distribute on the wire surfaces non-uniformly, and some projections grow to cluster in the negative cases. By a long discharge time, a thin silicon oxide film grows to cover on the wire surfaces non-uniformly in both polarity cases. The growths of the products affected by the discharge current also are studied.
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