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K-81

Lead Metaniobate Piezoelectric Ceramic with Low Mechanical Q and High Stability of Dielectric and Piezoelectric Constants

Lead metaniobate piezoelectric ceramic with low mechanical Q and high stability of dielectric and piezoelectric constants.Piezo Technologies' K-81 is a modified lead metaniobate piezoelectric ceramic with the following outstanding characteristics:

K-81 PHYSICAL & ELECTRICAL PROPERTIES
Note:  The above values are nominal. 

K3

 Relative Dielectric Constant 300
k31 Transverse Coupling Coefficient < 0.10
k15 Shear Coupling Coefficient 0.275
kt Thickness Coupling Coefficient 0.30
kp Planar Coupling Coefficient < 0.10
d33 Piezoelectric Strain Constant (x 10-12 Coul/Newton) 85
d31 Piezoelectric Strain Constant (x 10-12 Coul/Newton) -15
d15 Piezoelectric Strain Constant (x 10-12 Coul/Newton) 105
dh Hydrostatic Constant (x 10-3 Vm/N) 55
g33 Piezoelectric Voltage Constant (x 10-3 Vm/N) 32
g31 Piezoelectric Voltage Constant (x 10-3 Vm/N) -7
g15 Piezoelectric Voltage Constant (x 10-3 Vm/N) 31
Qm Mechanical Q (Thickness) < 15

YE33

 Young's Modulus at Constant Field (x 1010 N/m2) 5.5
D Dissipation (factored at 1kHz) 0.01
Nt Thickness Frequency Constant (kHz-in)
(Hz-m)		 60
1525
ρ Density (g/cm3) 6.2
ZA Acoustic Impedance (Mega RayL) 19
Vs Sound Velocity (m/sec) 3050
TC Curie Temperature (°C) 400
Resistivity ohm-cm 1013
CTE Coefficient of Thermal Expansion (x 10-6 in/in/°F) 0.71

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