DocumentCode
1065447
Title
The Effect of Chromium Oxide Coatings on Surface Flashover of Alumina Spacers in Vacuum
Author
Sudarshan, Tangal S. ; Cross, James D.
Author_Institution
Radio and Electrical Engineering Division, National Research Council of Canada, Ottawa, Ont., Canada
Issue
1
fYear
1976
fDate
3/1/1976 12:00:00 AM
Firstpage
32
Lastpage
35
Abstract
An experimental investigation of the effect of chromium oxide coatings upon the surface flashover of high-density alumina in vacuum is reported. It is shown that such coatings improve the withstand voltage for dc, 60-Hz, and impulse voltages by significant amounts. The coatings are simply applied, effective, and durable. It is postulated that the improvement in insulation is due to the elimination of positive surface charging by the use of a coating with a secondary-electron emission coefficient less than unity for all incident electron energies.
Keywords
Cathodes; Chromium; Coatings; Dielectrics and electrical insulation; Electron emission; Flashover; Plasma devices; Solids; Surface charging; Voltage;
fLanguage
English
Journal_Title
Electrical Insulation, IEEE Transactions on
Publisher
ieee
ISSN
0018-9367
Type
jour
DOI
10.1109/TEI.1976.297942
Filename
4080327
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