مواد دی­ الکتریک Dielectric Materials

Dielectric Materials

مواد دی­ الکتریک

ABSTRACT

Dielectric materials refer to those having the basic electric Property Of being Polarized in the Presence of an electric Field and having an electrostatic field within Them under the state of polarisation .(polarisation here refers to the molecular aligment along the direction of the applied electric field . ) Also synosymusly referred  to as an electrical insulation material the dielectric has the ability to prevent the leakage of electrical charges from the body on which it is deployed .In general electrical insulation materials which possess  dielectric properties offer a very hight resistance to the passage of electric current under the action of an applied direct - current voltage .Hence such materials differ distincty in basic electric properties from those classified as electric conductors such as metals .

مواد کامپوزیت دی الکتریک

Composite Dielectric Materials

مواد کامپوزیت دی الکتریک

ABSTRACT

Composite dielectrics represent, in general, a heterogeneous system of multiconstituent materials. Typically, a two-phase composite dielectric is constituted by a host material with an inclusion of another material. This host-inclusion system could be formed by a combination (or a mixture) of dielectric-dielectric, dielectric-conductor, and/or dielectric-semiconductor phases. The constituent phases may form structurally an embedment system consisting of multi-layer "layups" or random dispersion of the inclusions across the host medium; or there could be a structured matrix of specific type to yield certain desirable dielectric properties. Generically, a composite dielectric can be treated as as a mixture-medium, largely heterogeneous and could be anisotropic and nonlinear, as well.