In this paper

nano-alumina suspended liquid were prepared through micro-emulsion technology

then doped it into the polyimide matrix

and prepared polyimide film with 4%

8%

12%

16%

20%

24%(counting as Al2O3) amount of alumina.The structure and properties of the film were measured and characterized by corona discharge measuring equipment

breakdown strength measuring system

TGA and SEM

respectively.It is shown that the more the inorganic in polyimide composite film

the longer the corona-resistant lifespan of po...