A process that creates materials by exposing the material to a strong electrical field while being heated to a substantial temperature.

A process that creates materials by exposing the material to a strong electrical field while being heated to a substantial temperature.

• A. Doping
• B. Polarization
• C. Annealing
• D. Piezoelectric effect

Answer: (B)

Polarization is the process of aligning the internal dipoles or ferroelectric domains inside a material by applying a strong electric field, typically while the material is heated to a substantial temperature. The heat makes the dipoles more mobile, so they can reorient in the direction of the field. When the field is maintained and the material is cooled, that alignment is “frozen in,” leaving the material with a net polarization. This is the key step in preparing materials with strong piezoelectric or ferroelectric properties, because the aligned dipoles are what enable coupling between electrical and mechanical effects. Doping adds impurities, changing composition or conductivity; annealing is a heat-treatment process without necessarily applying an electric field; the piezoelectric effect is the coupling between electrical and mechanical energy, not a manufacturing step by itself.

Polarization is the process of aligning the internal dipoles or ferroelectric domains inside a material by applying a strong electric field, typically while the material is heated to a substantial temperature. The heat makes the dipoles more mobile, so they can reorient in the direction of the field. When the field is maintained and the material is cooled, that alignment is “frozen in,” leaving the material with a net polarization. This is the key step in preparing materials with strong piezoelectric or ferroelectric properties, because the aligned dipoles are what enable coupling between electrical and mechanical effects. Doping adds impurities, changing composition or conductivity; annealing is a heat-treatment process without necessarily applying an electric field; the piezoelectric effect is the coupling between electrical and mechanical energy, not a manufacturing step by itself.