磁场处理对聚偏二氟乙烯复合材料介电性能的影响  

Effect of Magnetic Field Treatment on Dielectric Property of Polyvinylidene Fluoride Composites

作　　者：孔德波[1] 郑皖月 高亮[1] KONG De-bo;ZHENG Wan-yue;GAO Liang(School of Electrical Engineering,Suihua University,Suhua 152061,China)

机构地区：[1]绥化学院电气工程学院,黑龙江绥化152061

出　　处：《塑料科技》2022年第6期54-59,共6页Plastics Science and Technology

基　　金：黑龙江省省属高等学校基本科研业务费基础研究项目(YWK10236200134);黑龙江省自然科学基金项目(JJ2020LH2012);黑龙江省大学生创新创业训练计划项目(202110236025)。

摘　　要：以镍沉积钛酸铜钙纳米颗粒(NC)为填料,通过流延法制备聚偏二氟乙烯(PVDF)/NC复合薄膜(PNC),研究磁场对PNC复合材料介电性能的影响。结果表明:40 nm的镍颗粒沉积在直径200 nm的钛酸铜钙球形颗粒表面。不同磁场强度结合温度处理能够促进PNC复合材料的极化响应,从而有效调控其介电性能。高温强磁场(150℃-1.5 T)能够引发PNC复合材料的绝缘-导电相变。而30℃与1.0 T的最佳磁场条件下,增加PNC复合材料的界面极化强度,显著提升其介电性能,使PNC复合材料在10 Hz频率下获得高介电常数(21)、低介电损耗(0.10)和低电导率(1.0×10^(-11)/cm)等介电性能。Polyvinylidene fluoride(PVDF)/NC composite films(PNC) were prepared by tape casting method using nickel deposited copper-calcium titanate nanoparticles(NC) as filler. The effect of magnetic field on the dielectric properties of PNC composites was studied. The results show that 40 nm nickel particles are deposited on the surface of 200 nm copper calcium titanate spherical particles. Different magnetic field intensity combined with temperature treatment can promote the polarization response of PNC composites, thus effectively control their dielectric properties. High temperature high magnetic field(150 ℃-1.5 T) can cause the insulation-conductive phase transition of PNC composites.Under the optimal magnetic field conditions of 30 ℃ and 1.0 T, the interfacial polarization of PNC composite is increased,and the dielectric properties are significantly improved, so that the PNC composite can obtain high dielectric constant(21),low dielectric loss(0.10) and low conductivity(1.0×10^(-11)/cm) at 10 Hz.

关 键 词：聚偏二氟乙烯 磁场处理 介电性能 极化强度 

分 类 号：TB333[一般工业技术—材料科学与工程] TM21[电气工程—电工理论与新技术]