Porous Magnetorheological Nanocomposites: Dielectric and Electrical Properties

This paper presents a brief experimental study on electrical and dielectric properties of porous film-shaped magnetorheological nanocomposites (MRNCs) based on room temperature vulcanized (RTV) silicone rubber and nano-sized carbonyl iron particles (CIPs). The electrical and dielectric properties of porous MRNCs were measured at five different filler concentrations. Several experiments were performed to measure the volume resistivity, dielectric constant and dielectric loss. The MRNCs dielectric properties were analysed with respect to the parameters like frequency and CIPs loadings. The electrical conductivity was studied in terms of volume resistivity. The distribution of internal charge was also measured for each sample using pulsed- electro-acoustic (PEA) method, under a DC electric field. The investigation’s resultssuggest the porous MRNCs for smart, sensitive and light-weighted structures benefit from a lower electrical property,charge density and dielectric constants.

کلیدواژه ها:

Charge Density ، dielectric ، Permittivity ، Resistivity ، Silicone Rubber