BST层厚度对BST/PVDF层状复合材料性能的影响

摘要

以钛酸锶钡(BST)超薄片为基体材料，添加聚偏氟乙烯(PVDF)聚合物制得的层状复合材料具有良好的介电性能，并具有良好的挠曲性，是一种柔性复合材料。在保持PVDF溶液比值仍1：8的情况下，逐渐增加BST厚度，复合材料对挠曲变形的抵抗能力增加，材料的介电常数呈现增加的趋势，介质损耗下降。不同厚度BST的复合材料介电常数以及介质损耗随频率均表现出相同的变化趋势。%The layered composite, which is a kind of lfexible composite material, prepared with barium strontium titanate (BST) ultrathin slices as the matrix and polyvinylidene fluoride (PVDF) polymer as the additive, exhibited good dielectricity and flexibility. With the increasing of the thickness of BST, the composites’ resistance to bend and dielectricity are increasing and their dielectric loss is decreasing with the ratio of PVDF solution at 1:8. The dielectric constant and the dielectric loss of the composites prepared from BST layer with different thickness both showed the same regularity.