Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9软磁粉/硅橡胶力敏复合材料的逾渗特性  

Percolation characteristics of Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 soft magnetic powder/silicone rubber stress sensitive composite

作　　者：李晓敏[1] 吴菊英[2] 朱正吼[1] 黄渝鸿[2] 高洋[2] 周佳[1] 

机构地区：[1]南昌大学材料科学与工程学院,江西南昌330031 [2]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《复合材料学报》2014年第1期88-92,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金委员会和中国工程物理研究院联合基金(11076016);973前期预研(2010CB635112);国家自然科学基金(60961001)

摘　　要：以三元嵌段共聚硅橡胶为基体,Fe73.5Cu1Nb3Si13.5B9软磁粉为应力敏感填充粒子,采用机械共混和精密铸压热成型方法制备出系列粉体含量的Fe73.5Cu1Nb3Si13.5B9软磁粉/硅橡胶接触应力敏感复合材料,重点研究了其交流阻抗、直流电阻、粒子间及粒子与硅橡胶间相互作用程度等性能的逾渗特性。研究表明,该柔性力敏复合材料具有较显著的交流阻抗双逾渗特性。分析发现,"第一逾渗区"内材料的交流阻抗值由粒子的隧道跃迁主导,"第二逾渗区"内材料的交流阻抗大小取决于Fe73.5Cu1Nb3Si13.5B9粒子链间的接触电阻值。Fe73.5 Cul Nb3 Si13.5 B9 soft magnetic powder/silicone rubber composites with different powder contents are prepared by mechanical blending and precise cast pressure hot forming method, using ternary block copolymerization silicone rubber as the matrices and Fe13.5 CulNb3Si13. 5 B9 soft magnetic powder as functional filler particles. The percolation characters of the composite are deeply studied through alternating current impedance, direct current resistance and the interaction degree of particles and particle with silicone rubber. It is shown that the flexible stress sensitive composite presents remarkable double percolation character of alternating-current impedance and it is also found that the alternating current impedance in ＂the first percolation area＂ is caused by the particle tunnel transition and ＂the second percolation area＂ depends on the contact resistance of Fe73.5 Cul Nb3 Si13.5 B9 particle chains.

关 键 词：FE73 5Cu1Nb3Si13 5B9软磁粉 硅橡胶 逾渗特性 压阻效应 磁效应 

分 类 号：TB332[一般工业技术—材料科学与工程]