Electrical Conduction and Space Charge in Gamma Irradiated XLPE

It is well known that ionizing radiation impact dielectric and mechanical properties of polymers, as a result of chain scission, crosslinking, and oxidation steps. The electrical conductivity is generally substantially increased after irradiation. We analyze such effects in XLPE after gamma-irradiat...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2023-10, Vol.30 (5), p.1-1
Main Authors: Mouchache, C., Saidi-Amroun, N., Griseri, V., Saidi, M., Teyssedre, G.
Format: Article
Language:English
Subjects:
Chain scission
Charge measurement
conductivity
Cross-linked polyethylene
Crosslinking
Current density
Electric fields
Electrical conduction
Electrical resistivity
Gamma irradiation
Ionizing radiation
Mechanical properties
Oxidation
Physics
Power cable insulation
Power cables
Radiation effects
radiation induced
Space charge
XLPE
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Summary:It is well known that ionizing radiation impact dielectric and mechanical properties of polymers, as a result of chain scission, crosslinking, and oxidation steps. The electrical conductivity is generally substantially increased after irradiation. We analyze such effects in XLPE after gamma-irradiation. Current measurements reveal a substantial increase in conductivity after irradiation at doses up to 200 kGy. Current-field characteristics change after irradiation and appear indicative of an ionic-type conduction. Space charge measurements confirm the mechanism with obvious heterocharge build-up after irradiation.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2023.3271612