Materials

Ceramic Materials


General Characteristics

Navy Type I (PZT-4) Navy Type II (PZT-5A) Navy Type VI (PZT-5H) Navy Type III (PZT-8)
Coupling Coefficients
k33 .700 .710 .750 .640
k31 .330 .340 .390 .300
k15 .710 .690 .680 .550
kp .580 .600 .650 .510
Piezoelectric Constants
d33 (x 10-12 m/V) 295 374 585 225
d31 -122 -171 -265 -97
d15 500 585 730 330
g33 (x 10-3 Vm/N) 24.9 24.8 19.7 24.0
g31 -10.6 -11.4 -8.5 -10.9
g15 39.0 38.2 29.0 -28.9
Free Dielectric Constant
KT33 1300 1700 3400 1000
KT11 1475 1730 3130 1290
Elastic Constants
SE33 (x 10-12 m2/N) 15.5 18.8 20.0 13.5
SE11 12.3 15.0 15.6 10.0
Physical Properties
Density (Kg/m3) 7600 7500 7500 7500
QM 400 100 65 1000
QE 250 50 40 250
Youngs Modulus (x 1010M/m2) Poisson ratio (ν) is approx. 0.31 for all ceramics 7.8 6.6 6.4 9.9
Curie Point (°C) 325 350 195 300
Frequency Constants
Nt (Hz-m) thickness 2000 1800 1765 2180
Ns (Hz-m) shear 1300 1080 1100 1400
Nr (Kz-m) radial 2150 2000 1950 2310

Data as published by various suppliers. BPO makes no claims as to accuracy of published information.