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K-700

Fine Grain Lead Zirconate Titanate Piezoelectric Ceramic with High Coupling, and Very High Dielectric Constant and Piezoelectric Constant

K-700 at 48000x, fractured surface - fine grain size and 40% improvement in fracture toughness, resulting in more uniform fine pitch elements.
K-700 at 48000x, fractured surface - fine grain size and 40% improvement in fracture toughness, resulting in more uniform fine pitch elements.

Piezo Technologies' K-700 is a fine grain ceramic without the compromises; a modified lead zirconate titanate piezoelectric ceramic that has a high coupling, and very high dielectric constant and piezoelectric constant. The high permittivity and high piezoelectric constant make it an excellent choice for 1-3 composites, and actuator applications.

The design and process created a fine grain ceramic that enhances the performance properties important to high frequency and fine pitch transducer designs. This next generation piezo material redefines the standard for fine grain ceramics.

Competitor's product at 48000x, fractured surface - Fine grain size with less fracture toughness creates intergranular fractures when the ceramic is broken or diced, resulting in non-uniform fine pitch elements.
Competitor's product at 48000x, fractured surface - Fine grain size with less fracture toughness creates intergranular fractures when the ceramic is broken or diced, resulting in non-uniform fine pitch elements.

Piezo Technologies' new Fine Grain Ceramics offer the following benefits:

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K-700 PHYSICAL & ELECTRICAL PROPERTIES
Note:  The above values are nominal. 

KT33

 Free Dielectric Constant 4000

KS33

 Clamped Dielectric Constant 2910
k33 Longitudinal Coupling Coefficient 0.77
k31 Transverse Coupling Coefficient 0.42
k15 Shear Coupling Coefficient 0.72
kt Thickness Coupling Coefficient 0.52
kp Planar Coupling Coefficient 0.71
d33 Piezoelectric Strain Constant (x 10-12 m/V) 700
d31 Piezoelectric Strain Constant (x 10-12 m/V) -290
d15 Piezoelectric Strain Constant (x 10-12 m/V) 950
g33 Piezoelectric Voltage Constant (x 10-3 Vm/N) 20.0
g31 Piezoelectric Voltage Constant (x 10-3 Vm/N) -9
g15 Piezoelectric Voltage Constant (x 10-3 Vm/N) 28

sE33

 Compliance at Constant Field (x 10-12 m2/N) 19

QM

 Mechanical Q (Thickness) 30

QM

 Mechanical Q (Radial) 60

YE33

 Young's Modulus at Constant Field (x 1010 N/m2) 5
D Dissipation (factored at 1kHz) 0.025
Nt Thickness Frequency Constant (kHz-in)
(Hz-m)		 79
2006
Np Planar Frequency Constant (kHz-in)
(Hz-m)		 80
2032
ρ Density (g/cm3) 7.8
ZA Acoustic Impedance (Mega RayL) 35
Vs Sound Velocity (m/sec) 4010
TC Curie Temperature (°C) 210
CTE Coefficient of Thermal Expansion (x 10-6 in/in/°F)
(20°C to 100°C)		 5.5
dave Average Grain Size (mm) 2 - 5

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