Effect of chromium oxide coating on surface flashover characteristics of ceramic in vacuum

Author

Shioiri, Tetsu ; Asari, Naoki ; Saito, Shin ; Nakamuta, Hironori ; Homma, Mitsutaka ; Suzuki, Katsumi

Author_Institution

Toshiba Corp., Tokyo

Volume

1

fYear

2006

fDate

25-29 Sept. 2006

Firstpage

140

Lastpage

143

Abstract

Experiments were conducted to determine the conditioning effects of a chromium oxide coating on a ceramic surface. Chromium oxide is known to have a small secondary electron emission coefficient. With a chromium oxide coating, conditioning effects were completed early and flash over voltage increased. While luminescence was observed on a bare ceramic surface under a high applied voltage, none was observed on the sample coated with chromium oxide. One cause of increasing flashover voltage due to coated chromium oxide is depression of the secondary electron avalanche. Another is considered to be depressed surface charge due to decreasing surface resistance

Keywords

ceramics; chromium compounds; flashover; surface discharges; vacuum arcs; ceramic characteristics; chromium oxide coating; conditioning effects; depressed surface charge; secondary electron avalanche; surface flashover characteristics; surface resistance; Ceramics; Chromium; Coatings; Electron emission; Flashover; Insulation; Surface discharges; Surface resistance; Surface treatment; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2006. ISDEIV '06. International Symposium on

Conference_Location

Matsue

ISSN

1093-2941

Print_ISBN

1-4244-0191-7

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2006.357251

Filename

4194831