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Local corona behavior and creeping discharge on (needle‐dielectric, semiconductor) composite electrodes
Author(s) -
Sakamoto Naoki,
Kuninaka Yoshito,
Ueno Hideki,
Nakayama Hiroshi
Publication year - 2003
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10208
Subject(s) - electrode , materials science , corona discharge , composite number , partial discharge , corona (planetary geology) , dielectric barrier discharge , voltage , borosilicate glass , brush discharge , composite material , semiconductor , dielectric , optics , electrical engineering , optoelectronics , chemistry , physics , engineering , astrobiology , venus
This paper describes local corona behavior and creeping discharge on composite electrode systems in N 2 . The composite electrode consisted of a needle contacted with a borosilicate glass or a ZnO disk on a needle–plane configuration. The discharge voltages increased when the needle was in contact with the glass with increasing creeping distance ( L ) from the needle tip to the bottom of the disk. The discharge voltages showed a reversed polarity effect beginning at L = 4 mm. In the case of a needle in contact with ZnO, the discharge voltage increased with distance until L = 2 mm, but decreased beyond L = 2 mm. Observation using an ultrahigh‐speed camera showed that the discharge behavior was different for the glass and for the ZnO. Corona photographs taken by a camera with an image intensifier showed that the corona was generated at the triple junction in the case of ZnO. The differences in discharge voltage characteristics and the discharge behavior between the glass and ZnO were associated with the corona properties. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(1): 1–9, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10208