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

K-278

Lead Zirconate Titanate Piezoelectric Ceramic for High-Power Applications

Lead zirconate titanate piezoelectric ceramic for high-power applications.Piezo Technologies' K-278 is a modified lead zirconate titanate piezoelectric ceramic developed for use in high-power applications. However, its piezoelectric activity level is slightly lower than K270. This material has a very high mechanical quality and extremely low loss factor, also a unique power handling capability.

K-278 PHYSICAL & ELECTRICAL PROPERTIES
Note:  The above values are nominal. 

K3

 Relative Dielectric Constant 1100
k33 Longitudinal Coupling Coefficient 0.64
k31 Transverse Coupling Coefficient 0.30
k15 Shear Coupling Coefficient 0.55
kt Thickness Coupling Coefficient 0.45
kp Planar Coupling Coefficient 0.51
d33 Piezoelectric Strain Constant (x 10-12 Coul/Newton) 240
d31 Piezoelectric Strain Constant (x 10-12 Coul/Newton) -95
d15 Piezoelectric Strain Constant (x 10-12 Coul/Newton) 325
g33 Piezoelectric Voltage Constant (x 10-3 Vm/N) 25.5
g31 Piezoelectric Voltage Constant (x 10-3 Vm/N) -10.9
g15 Piezoelectric Voltage Constant (x 10-3 Vm/N) 29
Qm Mechanical Q (Thickness) 200

YE33

 Young's Modulus at Constant Field (x 1010 N/m2) 7.4
D Dissipation (factored at 1kHz) 0.004
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) 300
CTE Coefficient of Thermal Expansion (x 10-6 in/in/°F) 2

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