中国电机工程学报2018，Vol.38Issue(9)：2815-2820,6.DOI:10.13334/j.0258-8013.pcsee.172185
γ射线辐照对氰酸酯-环氧树脂材料低温电气性能的影响
γ Irradiation Effects on Electric Properties of Cyanate-ester Epoxy at Cryogenic Temperatures
摘要
Abstract
Insulation materials used in large scale superconducting magnet need to maintain sound electric and mechanic performance under cryogenic temperature and intense γ radiation conditions. In this research, cyanate ester and bisphenol F epoxy resin were mixed as matrix, which was reinforced by boron glass fibre, and the glass fibre reinforced polymer (GFRP) was manufactured by vacuum pressure impregnation method and irradiated by γ rays for 1 MGy and 5 MGy. Dielectric properties and conduction current were tested and analysed at temperatures within 20～300 K. The test results shown that, as sample being cooled to 20 K, the γ peak of dielectric loss presented little change in its corresponding frequency, and the amplitude keeps decreasing with temperature. No loss peak was detected within the high frequency range, which indicates cryogenic temperature had little effect on interface between epoxy resin and glass fibre. The conduction current was weak at temperatures below 200 K and the space charge limited current threshold field was increased; crosslinking reaction was observed during irradiation and followed by degradation, and the later dominated the whole process generally, and the material was proved to be with high resistance to irradiation.关键词
环氧树脂/低温/真空/辐照/介电特性/电导电流Key words
epoxy resin/cryogenic/vacuum/irradiation/dielectric/conduction current分类
信息技术与安全科学引用本文复制引用
王劭鹤,屠幼萍,樊林禛,秦司晨,李来风,吴智雄..γ射线辐照对氰酸酯-环氧树脂材料低温电气性能的影响[J].中国电机工程学报,2018,38(9):2815-2820,6.基金项目
国家自然科学基金项目(51277062,51407180,51577062).Project Supported by National Natural Science Foundation of China (51277062,51407180 51577062). （51277062,51407180,51577062）
