Study on radiation aging of polymeric insulating material by positron annihilation

Author

Fujita, S. ; Baba, M. ; Noto, F. ; Suzuki, T. ; Kitahara, H.

Author_Institution

Dept. of Electr. Eng., Hachinohe Inst. of Technol., Hachinohe-shi, Japan

fYear

1993

fDate

17-20 Oct 1993

Firstpage

556

Lastpage

561

Abstract

Structure changes of fluoropolymer, a heat-resistant insulating material, after γ-ray irradiation, were investigated using positron annihilation. The correlation between structure changes and dielectric breakdown strength was studied. The dielectric breakdown strength is found to decrease with increasing dose. Positron lifetime data showed that crystallinity increased with irradiation. As the crystalline region is increased by irradiation, it is easy to accelerate electrons when impulse voltage is applied. It is then that dielectric breakdown occurs

Keywords

ageing; electric breakdown; gamma-ray effects; insulation testing; life testing; polymer insulators; polymer structure; polymers; positron annihilation; γ-ray irradiation; dielectric breakdown strength; fluoropolymer; heat-resistant insulating material; polymeric insulating material; positron annihilation; radiation aging; structure changes; Acceleration; Aging; Crystalline materials; Crystallization; Dielectric breakdown; Dielectric materials; Dielectrics and electrical insulation; Plastic insulation; Polymers; Positrons;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1993. Annual Report., Conference on

Conference_Location

Pocono Manor, PA

Print_ISBN

0-7803-0966-9

Type

conf

DOI

10.1109/CEIDP.1993.378914

Filename

378914