High Temperature/Lead Free Piezoceramics

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 400 405 450 560 850
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