Question

All Piezoelectric materials are Ferroelectric.

(a) True

(b) False

This question was posed to me during a job interview.

Question is from Piezoelectricity topic in section Dielectrics of Engineering Physics II

Answer 1

Correct answer is (b) False

To elaborate: All the ferroelectric materials are pyroelectric and piezoelectric but the reverse is not true. Ferroelectricity can occur only in noncentrosymmetric crystals, just like piezoelectricity.