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Piezo Tech is ISO 9001:2000 Certified. Certification No. C2006-02533. Keramos logo

K-181

Lead Zirconate Titanate Piezoelectric Ceramic with High Dielectric Constant, High Shear Coupling Coefficient with Low Permittivity, and High Temperature Stability

Lead zirconate titanate piezoelectric ceramic with high dielectric constant, high shear coupling coefficient with low permittivity, and high temperature stability.Piezo Technologies' K-181 is a modified lead zirconate titanate piezoelectric ceramic material similar to K180, but with a slightly lower dielectric constant. This material has a high shear coupling coefficient with low permittivity, and high temperature stability.

This material can be used in high frequency shear resonance applications such as ultrasonic delay lines. Also the high "kt" makes this material usable in some medium range frequency small diameter transducer applications.

K-181 PHYSICAL & ELECTRICAL PROPERTIES
Note:  The above values are nominal. 

KT33

 Free Dielectric Constant 380

KS33

 Clamped Dielectric Constant 225
k33 Longitudinal Coupling Coefficient 0.50
k31 Transverse Coupling Coefficient 0.22
k15 Shear Coupling Coefficient 0.51
kt Thickness Coupling Coefficient 0.50
kp Planar Coupling Coefficient 0.46
d33 Piezoelectric Strain Constant (x 10-12 m/V) 180
d31 Piezoelectric Strain Constant (x 10-12 m/V) -80
d15 Piezoelectric Strain Constant (x 10-12 m/V) 390
g33 Piezoelectric Voltage Constant (x 10-3 Vm/N) 35
g31 Piezoelectric Voltage Constant (x 10-3 Vm/N) -15
g15 Piezoelectric Voltage Constant (x 10-3 Vm/N) 49

sE33

 Compliance at Constant Field (x 10-12 m2/N) 11

QM

 Mechanical Q (Thickness) 220

QM

 Mechanical Q (Radial) 900

YE33

 Young's Modulus at Constant Field (x 1010 N/m2) 9.0
D Dissipation (factored at 1kHz) 0.005
Nt Thickness Frequency Constant (kHz-in)
(Hz-m)		 82
2080
Np Planar Frequency Constant (kHz-in)
(Hz-m)		 98
2490
ρ Density (g/cm3) 7.7
ZA Acoustic Impedance (Mega RayL) 31
Vs Sound Velocity (m/sec) 4060
TC Curie Temperature (°C) 360
CTE Coefficient of Thermal Expansion (x 10-6 in/in/°F)
(20°C to 250°C)		 1.6
dave Average Grain Size (mm) 5 - 7

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