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K-270

Lead Zirconate Titanate Piezoelectric Ceramic for High-Power Acoustic Radiating Transducers

Lead zirconate titanate piezoelectric ceramic for high-power acoustic radiating transducers.Piezo Technologies' K-270 is a modified lead zirconate titanate piezoelectric ceramic developed for use in high power acoustic radiating transducers. The material is highly resistant to depoling under conditions of severe mechanical stress and high voltage electric drive. The dielectric losses remain at low levels with high electric fields.

K-270 PHYSICAL & ELECTRICAL PROPERTIES
Note:  The above values are nominal. 

K3

 Relative Dielectric Constant 1300
k33 Longitudinal Coupling Coefficient 0.70
k31 Transverse Coupling Coefficient 0.33
k15 Shear Coupling Coefficient 0.71
kt Thickness Coupling Coefficient 0.41
kp Planar Coupling Coefficient 0.58
d33 Piezoelectric Strain Constant (x 10-12 Coul/Newton) 270
d31 Piezoelectric Strain Constant (x 10-12 Coul/Newton) -120
d15 Piezoelectric Strain Constant (x 10-12 Coul/Newton) 490
g33 Piezoelectric Voltage Constant (x 10-3 Vm/N) 26
g31 Piezoelectric Voltage Constant (x 10-3 Vm/N) -11
g15 Piezoelectric Voltage Constant (x 10-3 Vm/N) 38
Qm Mechanical Q (Thickness) 80

YE33

 Young's Modulus at Constant Field (x 1010 N/m2) 6.5
D Dissipation (factored at 1kHz) 0.005
Nt Thickness Frequency Constant (kHz-in)
(Hz-m)		 80
2030
ρ Density (g/cm3) 7.5
ZA Acoustic Impedance (Mega RayL) 31
Vs Sound Velocity (m/sec) 4065
TC Curie Temperature (°C) 325
CTE Coefficient of Thermal Expansion (x 10-6 in/in/°F) 2

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