Investigation on dielectric properties of γ-ray irradiated poly(ether ether ketone) by positron annihilation

Author

Fujita, S. ; Baba, M. ; Noto, F. ; Ruike, M. ; Suzuki, T. ; Onozuka, T.

Author_Institution

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

Volume

2

fYear

1994

fDate

3-8 Jul 1994

Firstpage

756

Abstract

Dielectric properties of γ-ray irradiated poly(ether-ether-ketone) were investigated under impulse voltage and AC voltage. Irradiation between 0 Gy and 10 MGy did not affect dielectric breakdown strength at room temperature, however, structural changes of the irradiated specimen were observed by positron annihilation. The intensity, I₃ of ortho-positronium decreased with increasing the dose, therefore, it was clarified that the amount of cavities in amorphous region decreased

Keywords

electric breakdown; electric strength; gamma-ray effects; insulation testing; organic insulating materials; polymer films; polymer structure; positron annihilation; γ-ray irradiation; 0 to 10 Gy; AC voltage; PEEK film; amorphous region cavities; dielectric breakdown strength; dielectric properties; impulse voltage; ortho-positronium; poly(ether ether ketone); positron annihilation; structural changes; Amorphous materials; Dielectric breakdown; Dielectric materials; Dielectric measurements; Educational institutions; Polymers; Positrons; Pulse measurements; Radiation safety; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on

Conference_Location

Brisbane, Qld.

Print_ISBN

0-7803-1307-0

Type

conf

DOI

10.1109/ICPADM.1994.414121

Filename

414121