S. Fujita, M. Baba, F. Noto, T. Suzuki, H. Kitahara
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引用次数: 2
Abstract
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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