BaTiO_3/PVDF复合材料的制备与介电性能研究  

Preparation and dielectric properties of BaTiO_3 /PVDF composites

作　　者：张建中[1] 华叶[1] 刘卓峰[1] 张为军[1] 

机构地区：[1]国防科学技术大学航天科学与工程学院,湖南长沙410073

出　　处：《材料保护》2013年第S2期91-92,95,共3页Materials Protection

摘　　要：采用二次沉淀法制备了BaTiO3粉体,通过XRD和SEM对于粉体进行表征,采用模压法制备了BaTiO3/PVDF介电复合材料,并测试了复合材料的介电性能。结果表明:反应温度升高,产物BaTiO3的团聚程度降低;Ti4+浓度影响BaTiO3中BaCO3杂质含量;BaTiO3粉体体积分数为50%时,复合材料的介电性能最优;复合材料介电性能和BaTiO3粉体粒径有关,BaTiO3粉体粒径在100 nm时,介电常数最高。In this paper,we adopt the two-step deposition method to prepare BaTiO3 powder,and use XRD and SEM to study this powder,in addition,we apply compression molding method to prepare BaTiO3 / PVDF and test the dielectric properties of composite materials. From the results we find: with reaction temperature increases,the agglomeration level of BaTiO3 decreased; secondly,the concentration of Ti4 +affects impurity content of BaCO3 in BaTiO3; thirdly,when BaTiO3 powder's volume fraction reaches50%,dielectric properties of composite materials perform best; finally,we find dielectric properties of composites have something to do with particle size of BaTiO3 powder,when its particle size is100nm,the dielectric constant reaches highest.

关 键 词：BATIO3 PVDF 复合材料 介电性能 

分 类 号：TB333[一般工业技术—材料科学与工程]