PVDF/BaTiO_(3)@SiO_(2)复合薄膜制备与介电性能

Fabrication and Dielectric Properties of PVDF/BaTiO_(3)@SiO_(2) Composite Film

通过溶胶凝胶法制备不同尺寸的BaTiO3@SiO2复合微球并利用混合辊压法成形聚偏二氟乙烯(PVDF)/BaTiO_(3)@SiO_(2)复合薄膜,通过扫描电子显微镜、透射电子显微镜表征其微观结构,并测试了复合材料的介电常数及介电损耗特性。结果表明,BaTiO_(3)@SiO_(2)复合颗粒与偏二氟乙烯共混热压成形方法,提高了无机颗粒的均匀分散性,同时降低了BaTiO_(3)的介电损耗,解决了目前BaTiO_(3)材料成形难度大、介电损耗大的难题,为性能增强介电材料的制备提供一种新思路。

BaTiO_(3)@SiO_(2) composite microspheres with different size by sol-gel method was prepared and fabricate PVDF/BaTiO_(3)@SiO_(2) composite film with heating and rolling process was formed.Scanning electron microscopy(SEM)and transmission electron microscope(TEM)were explored to character the morphology of samples and dielectric properties of films with different component were also researched.The results show that the method of mixture and thermoforming of BaTiO_(3)@SiO_(2) composite particles and PVDF powder can improve the homogeneity and dispersity of inorganic particles and reduce dielectric loss of BaTiO_(3).The method assuredly settles the matters of difficult formability and high dielectric loss of barium titanate and provides novel sight to fabricate enhance dielectric material.