High Temperature/Lead Free Piezoceramics
Typical values of high temperature piezoelectric ceramic materials
| Omega Material | OPT400 | OPT405 | OPT450 | OPT560 | OPT850 | |
|---|---|---|---|---|---|---|
| Equivalent Material | K81 | K85 | PT | PNA | HT | |
| Curie temperature (℃) | Tc | 400 | 405 | 450 | 560 | 530 |
| Piezoelectric charge constants (pC/N) |
d33 | 85 | 160 | 48 | 74 | 18 |
| Piezoelectric voltage constants (x10-3 Vm/N) |
g33 | 27.2 | 29 | 33.8 | 36.4 | 15.2 |
| Coupling coefficients | Kp | 0.29 | 0.28 | 0.08 | 0.04 | 0.05 |
| Kt | 0.3 | 0.4 | 0.44 | 0.41 | 0.3 | |
| Dielectric constant | ET33 / E0 | 350 | 650 | 160 | 230 | 134 |
| Dissipation factor (%) | tan δ | 0.6 | 1.7 | 0.8 | 0.7 | 0.1 |
| Mechanical Q | Qm | 15 | 30 | 50 | 16 | 7800 |
| Frequency constant (Hz x m) |
Nt | 1720 | 1700 | 2100 | 1600 | 2590 |
| Poison’s ratio | qE | 0.41 | 0.41 | 0.28 | 0.19 | 0.24 |
| Density (g/cm3) | 5.4 | 5.5 | 7.7 | 6 | 7.2 | |
Above materials are used as design reference only, standard tolerances are approximately ±20%. Material properties are measured based on the standard IEEE and DOD definitions and measuring techniques. All data here represent nominal characteristics (20+/-1 ℃) 72 hours after polarization.
Lead Free Barium Titanate Piezoceramic
| Omega Material | OPTBT | |
|---|---|---|
| Composition | BaTiO3 | |
| Dielectric constants | ET33 / E0 | 1500 |
| Dissipation factor [%] | tan δ | 0.50 |
| Coupling coefficient | Kp | 0.35 |
| Piezoelectric charge | d33 | 150 |
| Piezoelectric | g33 | 11.4 |
| Mechanical Q | Qm | 2000 |
| Frequency constants [Hz x m] |
Nt | 2680 |
| Np | 3160 | |
| Poison’s ratio | 0.30 | |
| Curie temperature [℃] | Tc | 110 |
| Density [g/cm3] | r | 5.70 |