项目名称: 多场作用下聚酰亚胺基纳米电介质界面结构演化的原位同步辐射研究
项目编号: No.51307046
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 电工技术
项目作者: 刘晓旭
作者单位: 黑龙江科技大学
项目金额: 25万元
中文摘要: 聚合物基纳米电介质的界面结构及其随外场的演化将对纳米电介质的宏观电气绝缘性能起决定作用,其为工程电介质领域尤为关注的科学问题,本项目力图制备高性能聚酰亚胺基纳米电介质,并在不同温度场下进行交流老化试验,同时利用强度比普通X射线高数万倍的同步辐射X射线对薄膜进行在线原位测试,探究有机无机两相间的界面结构等微观结构的演化信息;对不同温度老化后的样品,利用常规测试手段(SEM TEM等)测试微观结构变化,利用软件模拟研究体系化学键、带隙、电荷分布等参量随外场演化规律。原位测试与离线测试相结合,理论模拟与实验测试相结合,以原位测试为手段,以理论模拟为指导,以其他静态测试为辅助,发现新现象,总结新规律。探索不同温度下电晕老化机理,进而指导材料制备,为提高材料性能提供理论依据,为纳米电介质界面结构测试探索新手段,为预报纳米电介质失效开拓新方法。
中文关键词: 聚酰亚胺;同步辐射;纳米电介质;电气绝缘;
英文摘要: Under the electrical field, polymer-based nanodielectric interface structure and evolution will play a decisive role for electrical insulation performance of material.This is the important scientific problem in the field of engineering dielectric.This project start with the synthesis of high performance polyimide based nanodielectric, and then give more insight into the its microstructure evolution related to temperature and AC current via various characterization methods, such as Synchrotron radiation X-ray (SAXS,WAXS). Meanwhile, the changes in chemical bond, band gap as well as charge distribution will be simulated by Materials Studio software. By making full use of both in-situ and off-line tests, theoretic stimulation and practical experiments, New phenomenon and meaningful conclusion will be explored and act as guider to help us find mew way to characterize, predict and improve performance of corona-resistant materials.
英文关键词: polyimide;Synchrotron radiation;Nano dielectric;Electrical insulation;