Electrical Properties of Ceramics

ELECTRICAL PROPERTIES

Electrical properties depends upon composition, texture, size and density of material and also on temperature and time. These factors greatly influence the electrical behavior of a ceramic material.

Ceramic materials are used as insulators, conductors, semiconductor and dielectrics. Ceramics are also used as ferroelectric and piezoelectric materials.

Ceramics are generally poor conductors of electricity because the electrons associated with the atoms of ceramics are shared covalent or ionic bonds. The 90m electrical properties of ceramics mainly depend on the beniup following factors. abiss mon dostis

(i) volume resistivity,

(ii) dielectric strength,

(iii) dielectric constant, and

(iv) dissipation factor (or loss factor).

Ceramic insulator

Ceramic materials are used in an electrical circuit both as the electrical insulator and as its functional parts.

Porcelains are very commonly used as electrical insulators and resistors.

Dielectric ceramics

Ceramic materials have good dielectric capacity.

Porcelain and high grade fire clays have high dielectric strength . The dielectric varies with temperature.

Ceramic semiconductor

Although ceramic compounds are normally insulators, they become semiconductors if they contain multivalent transition elements.