NDLI: Influence of surface ion exchange on pulsed flashover characteristics of machinable ceramics in vacuum

Content Provider	IEEE Xplore Digital Library
Author	Nan Zheng Guan-Jun Zhang Xue-Zeng Huang Peng Zhai Xin-Pei Ma Guang-Xin Li
Copyright Year	1994
Abstract	For pulsed power devices, the surface flashover across their solid insulation becomes a serious problem. Investigators have paid much attention on improving the surface electric withstanding strength of insulator. It is found that surface treatment is very useful to increase the surface flashover voltage. The flashover phenomena along machinable ceramics (MCs) are investigated under pulsed voltage in vacuum. The ion exchange method is used to adjust the surface components of MCs for improving its surface electric strength. CuSO₄ is used for ion exchanging with the MC. It is found that ion exchange treatment greatly changes the surface components and microstructure of MCs, which has obvious influence on flashover characteristics of MCs. The MCs with 10 h ion-exchange time show a much improved flashover holdoff. Based on the secondary electron emission avalanche (SEEA) theory, the improvement of flashover withstanding ability can be reasonably explained by electron impact and transport behaviors.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
File Size	1547884
File Format	PDF
ISSN	10709878
Volume Number	18
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface treatment Flashover Surface charging Surface roughness Rough surfaces Ions Materials vacuum machinable ceramics secondary electron emission
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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