Mechanical and dielectric response of microcomposites of the type: ferroelastic-dielectric

Abstract

Dynamic dielectric and mechanical responses of the microcomposites of the ferroelastic-dielectric type were studied in this paper. The mechanical inclusions-matrix interactions have influence on the mechanical moduli of the composite. We have studied a mechanical response of the composite which consists of the material M and of the other material I in which dispersion of mechanic moduli of particles is present. The inclusions of the dielectric material in the ferroelastic matrix has the effect on the dielectric response of the microcomposite. We have found conditions for which the inclusions have the effect of enhancement of the dielectric response. Results of low frequency dielectric constant and dielectric loss in orthorhombic $ Al_{2}(WO_{4})_{3}$ show for polycrystalline material, where voids play the role of the dielectric material, their linear increasing dependence on increasing hydrostatic pressure p. These facts are qualitatively explained within our theory.