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European piezo ceramic is a global manufacturer and supplier of high quality piezoelectric ceramics and piezoelectric products for customers in a wide range of industries:

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Our company can be found in Czech republic, Librice 115, 503 44 Librice.

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Physical and Piezoelectric Properties of APCI Materials

 Material: 840 841 850 855 856 880
 Relative Dielectric Constant
KT 1250 1350 1900 3400 4100 1000
 Dielectric Dissipation Factor (Dielectric Loss (%)*
tan Piezokeramika 0.4 0.35 1.4 1.9 2.7 0.35
 Curie Point (°C)**
Tc 325 320 360 200 150 310
 Electromechanical Coupling Factor (%)
kp 0.59 0.60 0.63 0.68 0.65 0.50
k33 0.72 0.68 0.72 0.76 0.73 0.62
k31 0.35 0.33 0.36 0.40 0.36 0.30
k15 0.70 0.67 0.68 0.66 0.65 0.55
 Piezoelectric Charge Constant (10-12 C/N or 10-12 m/V)
d33 290 300 400 600 620 215
-d31 125 109 175 276 260 95
d15 480 450 590 720 710 330
 Piezoelectric Voltage Constant (10-3 Vm/N or 10-3 m2/C)
g33 26.5 25.5 26 21.0 18.5 25
-g31 11 10.5 12.4 9.0 8.1 10
g15 38 35 36 27 25 28
 Young's Modulus (1010 N/m2)
YE11 8 7.6 6.3 5.9 5.8 9
YE33 6.8 6.3 5.4 5.1 4.5 7.2
 Frequency Constants (Hz*m or m/s)
NL (longitudinal) 1524 1700 1500 1390 --- 1725
NT (thickness) 2005 2005 2032 1785 1980 2110
NP (planar) 2130 2055 1980 1920 --- 2120
 Density (g/cm3)
Piezokeramika 7.6 7.6 7.7 7.6 7.5 7.6
 Mechanical Quality Factor
Qm 500 1400 80 65 72 1000
Piezokeramika

All values nominal; measurements made 24 hours after polarization.
Maximum voltage:
     5-7 VAC /mil for 850,855,856 VDC ~2X.
     9-11 VAC /mil for 840,841,880 VDC ~2X.
*At 1 kHz, low field.
**Maximum operating temperature = Curie point/2.

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