Permittivity
2022-07-25 14:17
The permittivity, or dielectric constant, 
, for a piezoelectric ceramic material is the dielectric displacement per unit electric field. T is the permittivity at constant stress, S is the permittivity at constant strain. The first subscript to indicates the direction of the dielectric displacement; the second is the direction of the electric field.
The relative dielectric constant, K, is the ratio of , the amount of charge that an element constructed from the ceramic material can store, relative to the absolute dielectric constant, 0 , the charge that can be stored by the same electrodes when separated by a vacuum, at equal voltage (0 = 8.85 x 10-12 farad / meter).
|
|
permittivity for dielectric displacement and electric field in direction 1 (perpendicular to direction in which ceramic element is polarized), under constant stress |
|
|
permittivity for dielectric displacement and electric field in direction 3 (parallel to direction in which ceramic element is polarized), under constant strain |
MORE
Contact us
2501b, block B, central Times Square, Longgang central city, Shenzhen,China