高分子绝缘材料的正电子湮没辐射老化研究

Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93) Pub Date : 1993-10-17 DOI:10.1109/CEIDP.1993.378914

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

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引用次数: 2

摘要

用正电子湮灭法研究了高温绝缘材料氟聚合物在/spl γ射线辐照后的结构变化。研究了结构变化与介质击穿强度的关系。介质击穿强度随剂量的增加而降低。正电子寿命数据表明，随着辐照，结晶度增加。由于辐照增大了晶体区域，在施加脉冲电压时，电子容易加速。这时就发生了介电击穿。

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Study on radiation aging of polymeric insulating material by positron annihilation

Structure changes of fluoropolymer, a heat-resistant insulating material, after /spl gamma/-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.<>

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Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93)

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