Table 2.

Material properties of various APC piezoelectric materials ( ${\epsilon }_0=8.85\times {10}^{-12}\text{F/m}$).

Piezoelectric Material	PZT-4 (APC 840)	PZT-5A (APC 850)	PZT-5H (APC 855)	PZT-8 (APC 880)
Young’s Modulus (GPa)	68	54	51	72
Poisson’s Ratio	0.42	0.42	0.42	0.42
Piezoelectric Constant, $d_{33}(m/V)\times {10}^{-12}$	290	400	630	215
Relative Permittivity, ${\epsilon }_{33}^T/{\epsilon }_0$	1275	1900	3300	1050