High-dielectric-permittivity high-elasticity three-component nanocomposites with low percolation threshold and low dielectric loss

Abstract

Three-component high-elasticity nanocomposites consisting of methyl vinyl silicone rubber (VMQ) and nanosized barium titanate (BT) and carbon black (CB) were fabricated. Studies on dielectric property and elastic modulus of the CB-BT/VMQ nanocomposites showed that the composites had a low percolation threshold (fc=0.0355) due to the use of nanosized CB, and the maximum of dielectric permittivity was 960 at 103 Hz with a low dielectric loss (0.04). When the concentration of CB was close to fc, the dielectric permittivity was sensitive to the change in temperature. The present dielectric properties and excellent elasticity would satisfy the need in practical applications, especially in some fields of cable accessories and heat sensitive sensors.