Stress-impedance property of amorphous powder/silicone rubber composite film

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.