Conductivity And Permittivity Of NickelNanoparticle-Containing Polymer Materials In The Vicinity Of Percolation Threshold

Аннотация

The behaviour of conductivity σ and permittivity ε of metal-polymer composites comprising Ni particles dispersed in the phenilon was studied. It is found that the percolationlike behaviour of σ and ε, which is observed when the Ni particles are the sizes of 1 -3 µ m (micro-dispersed part icles), gave way to another behaviour characterized by an addit ional contribution to σ and ε below the percolation threshold when the Ni particles are the sizes of ≤ 30 nm (nanoparticles). This peculiarit y of the behaviour of σ and ε of the composites can be explained in the frame of the network hierarchy model of composites, which was proposed recently by Balberg et al.