This article briefly reviews and explores the various polarization mechanisms involved in
ionic crystals in different conditions. Ionic polarization is a mechanism that contributes to the
relative permittivity of a material. This type of polarization typically occurs in ionic crystal
elements such as NaCl etc. There is no net polarization inside these materials in the
absence of an external electric field because the dipole moments of the negative ions are
cancelled out with the positive ions. However, when an external field is applied, the ions …