聚偏氟乙烯/银粉复合材料的介电性能研究  

Study of Dielectric Properties on Polyvinylidene/Silver Flexible Composites

作　　者：陈澄[1] 董丽杰[1] 李海蓉[1] 熊传溪[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《武汉理工大学学报》2010年第13期23-25,共3页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50802068)

摘　　要：采用熔压法,将聚偏氟乙烯（PVDF）和超细银粉（Ag）复合,制备了PVDF/Ag复合材料。通过阻抗分析测试了复合材料的电性能,并用扫描电镜表征了复合材料的微观形态。结果表明,随着Ag粉体积分数的增加,复合材料的介电性能提高。当银粉体积分数15.5%,频率在100 Hz时,复合材料的介电常数可达58。在频率为102~105Hz下,复合材料的介电常数表现出较好的频率稳定性,同时低的无机填充量,使PVDF/Ag保持了聚合物理想的柔韧性。Based on melt press method,the polyvinylidene/silver composites with different volume fraction content of silver powder are prepared.The dielectric property of PVDF/Ag composites is measured by impedance analysis and their microstructure is also characterized by SEM.The results show that the dielectric constant and the dielectric loss of these composites increased with the increase of the volume fraction of Ag powder.As the volume fraction of Ag powder is 15.5 %,the dielectric constant（ε） can reach 58 and the dielectric loss is 0.056 at 100 Hz,respectively.The PVDF/Ag composites show excellent frequency stability during 102～105 Hz.Furthermore,with low volume fraction of Ag powder,the composites exhibit a desirable flexibility.

关 键 词：PVDF Ag粉 介电常数 介电损耗 

分 类 号：TB333[一般工业技术—材料科学与工程]