Table 1 Material properties of the aluminum and PZT-4D
From: L-shape triple defects in a phononic crystal for broadband piezoelectric energy harvesting
Description | Value |
|---|---|
Aluminum | Â |
 Density | 2700 kg/m3 |
 Young’s modulus | 70 GPa |
 Poisson’s ratio | 0.33 |
PZT-4D | Â |
 Density | 7600 kg/m3 |
 Elastic constant at an electric field |  |
  c11 | 135 GPa |
  c12 | 98.5 GPa |
  c13 | 93.1 GPa |
  c33 | 128 GPa |
  c44 | 238 GPa |
  c66 | 277 GPa |
 Piezoelectric constant |  |
  d31 | − 4.73 C/m2 |
  d33 | 15.3 C/m2 |
  d15 | 13.1 C/m2 |
 Relative dielectric permittivity at constant stress |  |
  ε11/ε0 | 797 |
  ε33/ε0 | 763 |