| PVDF is an organic ferroelectric material with good flexility, so it has been used in a variety of fields at the moment. As a new composite, PVDF/inorganic ferroelectric composites can avoid the application temperature limitation of polymeric materials and the brittleness of ferroelectric ceramics, it also can doubled a part of electrical properties of the composites. And PVDF/inorganic ferroelectric composites are hopeful to have new property as a new material, so it has attracted increasing attention. And the researches of these materials have got very fast development. Polymer-ceramic ferroelectric composites have widely and valuable use in medical and military fields replacing ceramics because of its good combination property.In this work, The PVDF/BaTiO3 (Bi4Ti3O12) composites which are prepared by coating technique are selected as objects. Then main researches contain the change law of dielectric property of PVDF/ceramic composites as the change of the contents and the heat treatment temperatures of ceramics, and its mechanism is discussed. The microscopic structure of the ceramic powders and composites are researched by x-ray diffraction, Fourier transform infrared spectrometry, scanning electron microscope and atomic Force Microscope. The effects of the macro-performance of the composites which were caused by the change of the composites'microscopic structure are discussed.This experiment is used to explore the effects of composites'macro-performance and microscopic structure through changing the contents and the heat treatment temperatures of ceramics. It is helpful to find out the relationship between the change of the PVDF/ceramic composites'physical property and the vary of composites'microscopic structure.
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