选用硅橡胶为基材, Fe73.5Cu1Nb3Si13.5B9非晶纳米晶软磁合金粉体为磁性功能填料, 采用机械共混的方法制备非晶粉/硅橡胶力敏复合材料。采用自制测试夹具测试非晶粉/硅橡胶复合材料的阻抗值, 采用扫描电镜分析非晶粉颗粒形貌及其在硅橡胶基材中分散情况, 在此基础上研究了复合材料界面绝缘性、单层与多层叠加复合薄膜、加入导电层及其层数对复合应力阻抗性能的影响。研究结果表明: 铜箔作为界面强化导电层的加入是提高复合薄膜力敏特性的有效途径之一, 设计实验中的复合薄膜/铜箔/复合薄膜结构相当于聚合物/金属/聚合物三明治多层膜结构, 对敏感性具有增强效应。

Amorphous powder/silicone rubber composite was prepared by blending amorphous Fe73.5Cu1Nb3Si13.5B9 magnetic nano-powder with silicone rubber. Impedance property of the obtained composite was studied by a home-made device. Scanning electron microscope was used to study the surface and scattering property of the amorphous particles. Other factors, such as the insulation of the composite, single or multi layered, addition of conductive layer and the number of conductive on the property of impedance were studied. The results indicate that addition of conductive copper layer is effective for the improvement of pressure-sensitive property. Composite film/copper film/composite film designed here is actually equivalent to polymer/metal/polymer structure, which could enhance the pressure sensitive property of the system.