The dielectric composites of PI/TiO2.are prepared by adopting the methods of in situ combined by sol-gel process.The chemical structure,phase and microstructure of the composites are studied.The effects of titanium dioxide content on the thermal stability and dielectric properties of the composite films are systematically investigated.The research shows that Nano-TiO2 can be evenly dispersed in the polyimide matrix,and the chemical structure and crystal morphology of polyimide are not destroyed by TiO2.With the increase of TiO2 content,the thermal stability of the composite films is gradually ...
