Title :
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
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;
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
DOI :
10.1109/ICPADM.1994.414121
