Abstract: Transverse field-induced strain (x₂-^E), hysteresis loop (P-E), dielectric constant and piezoelectric
coefficient under DC bias were measured for 3mol% barium-doped PLZT 10/65/35 relaxor ferroelectric ceramic. Dynamic dielectric constant and piezoelectric
coefficient were calculated according to the slope of x₂-E and P-E curves respectively. Dynamic dielectric constant is much larger than DC biased dielectric
constant as the electric field is less than 8 kV/cm, the difference between them is getting smaller as the electric field increases. Dynamic piezoelectric
coefficient is much larger than the value under DC bias as the electric field is in the range of 3--15 kV/cm, the difference between them is small as
the electric field is less than 3 kV/cm or higher than 15 kV/cm.

Key words: dielectric, piezoelectric, dynamic, DC bias, relaxor ferroelectric ceramic