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Interfacial space charge between ZnO varistor ceramics and coatings

Interfacial space charge between ZnO varistor ceramics and coatings
Interfacial space charge between ZnO varistor ceramics and coatings
The interfacial space charge distribution between ZnO varistor ceramics and different collar coating materials was investigated using the Pulsed Electroacoustic Method (PEA) and Thermal Stimulated Current (TSC) methods. The experimental results show that a large amount of space charge accumulates at the interface between ZnO varistor ceramics and polyester polyurethane, while there is less space charge presents at the interface between ZnO varistor ceramics and polyester modified silicone. The PEA results show that the introduction of inorganic glass between ZnO varistor ceramics and organic coating materials can greatly reduce the amount of space charge. The results from the surface flashover measurement, which was based on 4/10 ms steep impulse current, indicated that more space charge present at the interface between ZnO varistor ceramics and coating materials will lead to lower withstanding flashover capability of ZnO blocks since the electric field can be deviated due to the existence of interfacial space charge.
0-7803-7502-5
Li, S T
ffe0dc55-9ec1-489f-a25e-43f962990931
Li, J Y
9005acc4-cd82-429c-b00f-4218bef70968
Chen, G
07deca35-2545-4548-9657-9fe3bb50d4e8
Davies, A E
56d95222-b259-494a-92e9-68b090ec0dcd
Li, S T
ffe0dc55-9ec1-489f-a25e-43f962990931
Li, J Y
9005acc4-cd82-429c-b00f-4218bef70968
Chen, G
07deca35-2545-4548-9657-9fe3bb50d4e8
Davies, A E
56d95222-b259-494a-92e9-68b090ec0dcd

(2002) Interfacial space charge between ZnO varistor ceramics and coatings. Li, S T, Li, J Y, Chen, G and Davies, A E (eds.) 2002 IEEE Conference on Electrical Insulation and Dielectric Phenomena, pages 478-481, Cancun, Mexico. 19 - 23 Oct 2002.

Record type: Conference or Workshop Item (Other)

Abstract

The interfacial space charge distribution between ZnO varistor ceramics and different collar coating materials was investigated using the Pulsed Electroacoustic Method (PEA) and Thermal Stimulated Current (TSC) methods. The experimental results show that a large amount of space charge accumulates at the interface between ZnO varistor ceramics and polyester polyurethane, while there is less space charge presents at the interface between ZnO varistor ceramics and polyester modified silicone. The PEA results show that the introduction of inorganic glass between ZnO varistor ceramics and organic coating materials can greatly reduce the amount of space charge. The results from the surface flashover measurement, which was based on 4/10 ms steep impulse current, indicated that more space charge present at the interface between ZnO varistor ceramics and coating materials will lead to lower withstanding flashover capability of ZnO blocks since the electric field can be deviated due to the existence of interfacial space charge.

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More information

Published date: 2002
Additional Information: Event Dates: 20-24 Oct. 2002
Venue - Dates: 2002 IEEE Conference on Electrical Insulation and Dielectric Phenomena, pages 478-481, Cancun, Mexico, 2002-10-19 - 2002-10-23
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 257531
URI: http://eprints.soton.ac.uk/id/eprint/257531
ISBN: 0-7803-7502-5
PURE UUID: e4de85cd-4d87-469f-8334-01bb7cec7308

Catalogue record

Date deposited: 04 Jun 2003
Last modified: 29 Jan 2020 15:28

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