Dielectric Constant Value Of Ceramic

Ceramic materials offer a number of benefits in a variety of applications.

Dielectric constant value of ceramic.

The value of the static dielectric constant of any material is always greater than one its value for a vacuum. The value of the dielectric constant at room temperature 25 c or 77 f is 1 00059 for air 2 25 for paraffin 78 2 for water and about 2 000 for barium titanate batio 3 when the electric field is applied perpendicularly to the principal axis of the crystal. The application of a large dc bias field resulted in a decrease in the dielectric constant and dielectric loss of the multilayer piezoelectric ceramics. A ceramic capacitor is a fixed value capacitor where the ceramic material acts as the dielectric it is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes the composition of the ceramic material defines the electrical behavior and therefore applications.

Dielectric strength is determined as value of electric field strength expressed in v m at which electron conductivity breakdown occurs. The test can be conducted at different frequencies often between the 10hz and 2mhz range the sample must be flat and larger than the 50mm 2 in circular electrodes used for the measurement. The shift of the curie temperature t c towards a higher value and stabilized temperature dependent dielectric properties were observed under the dc bias field.