Thermal behavior of BST//PVDF ceramicapolymer composites

In this paper, we report the results of a study of microstructure and thermal behavior of ceramicapolymer composites composed of barium strontium titanate Ba0.6Sr0.4TiO3 (BST60/40) and polyvinylidene fluoride (PVDF). The Ba0.6Sr0.4TiO3 ceramic powder was prepared by the sol-gel method. Thermal evolution of the dried gel as well as ceramic powder was studied by simultaneous thermal analysis. The composite BST60/40//PVDF was obtained by hot pressing method for volume fraction of BST60/40 ceramic powder c v = 50 %. The morphology of BST60/40//PVDF composite powder was observed by transmission electron microscopy and the morphology of BST60/40//PVDF composite sample was observed by scanning electron microscopy. Temperature dependence of dielectric constant and dielectric loss factor of BST60/40//PVDF composites was measured in the frequency range of f = (10 A 103a1 A 106) Hz. Dynamic mechanical properties of BST60/40//PVDF composites were measured by dynamic mechanical thermal analysis DMTA.