摘要
对聚酰亚胺/纳米TiO2薄膜进行了热老化和电晕老化性能评估。利用热重点斜法评估了纯PI薄膜的耐热老化性能,用TGA、DSC等手段研究了聚酰亚胺/纳米TiO2复合材料薄膜的相对耐热性能。基于IEC60343标准建立了一套耐电晕老化试验系统,对不同纳米填充量的聚酰亚胺/纳米TiO2复合薄膜进行了耐电晕老化试验。结果表明,纳米TiO2的引入,改善了聚酰亚胺薄膜的耐电晕性能,提高了聚酰亚胺薄膜在变频绝缘的运行寿命,但是随着纳米TiO2填充量的进一步增加,薄膜的耐电晕寿命以及热性能下降。
Nano-filled insulation materials play more and more important role in the electrical industry;so to evaluate its character properly is very important. In this paper,evaluation of thermal aging characteristic and the corona-resistance aging characteristic of nano-TiO2-filled polyimide composite were performed.The thermalgravimetric point slope（TPS） method was used to assess the thermal characteristic of pure polyimide film,and then the rapid thermal analysis methods TGA and DSC were used to study the thermal aging characteristic of the nanofilled polyimide.A corona-resistance test system was built up based on IEC60343; and nano-TiO2-filled polyimide composite film with different filling amount of nano-TiO2 was tested.Then Weibull method was used to analyze the test data.The research results show that the thermal aging characteristic of nano-TiO2-filled polyimide composite decreases with the increase of TiO2 filling amount,while the property of corona-resistance exhibits a peak value with the increase of nano-TiO2 content.
出处
《绝缘材料》
CAS
北大核心
2009年第6期51-53,共3页
Insulating Materials
关键词
纳米填充
聚酰亚胺
加速老化
热老化
耐电晕寿命
nano-filled
polyimide
accelerate aging
thermal aging
corona-resistant lifetime
