Relative Permittivity of TiO2/Silicone Elastomer Composite Stretched in Uniaxial Direction

A dielectric elastomer is used for conversion of electrical and mechanical energy. The output energy of dielectric elastomer depends on the relative permittivity of the elastomer sheet. The relative permittivity of the elastomer can be increased by filling the elastomer with high permittivity particles. In this paper, the relative permittivity of TiO2/silicone elastomer composites was measured in the uniaxial stretching experiment assuming the state of use of dielectric elastomer. The relative permittivity of TiO2/silicone elastomer composite was higher than that of unfilled silicone elastomer and also increased with the increase in the volume fraction of TiO2particles. The uniaxial stretching reduced the relative permittivity of the composite. The decreasing ratio of the stretched composites was larger than that of the stretched silicone.