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/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/M] |
Nt | 2680 |
Np | 3160 | |
Poison’s ratio | 0.30 | |
Curie temperature [℃] | Tc | 110 |
Density [g/cm3] | r | 5.70 |