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Physical and Piezoelectric Properties of APCI Materials

Material: 842 844 851 854 881
Relative Dielectric Constant
KT 1375 1500 1950 3400 1030
Dielectric Dissipation Factor (Dielectric Loss(%)*
tan δ 0.45 0.4 1.5 1.7 0.4
Curie Point (°C)**
Tc 325 320 360 180 310
Electromechanical Coupling Factor
kp 0.65 0.68 0.71 0.77 0.58
kt 0.48 0.48 0.51 0.52 0.46
Piezoelectric Charge Constant (10-12 C/N or 10-12 m/V)
d33 300 300 400 650 260
Piezoelectric Voltage Constant (10-3 Vm/N or 10-3 m2/C)
g33 26.3 24.5 24.8 20.9 26.7
Young's Modulus (1010 N/m2)
YE11 8 7.6 6.3 5.9 9
YE33 6.8 6.3 5.4 5.1 7.2
Frequency Constants (Hz*m or m/s)
NT (thickness) 2050 2050 2040 2040 2050
NP (planar) 2230 2250 2080 1980 2300
Density (g/cm3)
ρ 7.6 7.7 7.6 7.6 7.6
Mechanical Quality Factor
Qm 600 1500 80 65 1000

The values listed above pertain to test specimens. They are for reference purposes only and cannot be applied unconditionally to other shapes and dimensions. In practice, components show varying values depending on their thickness, actual shape, surface finish, shaping process and post-processing.

Note: measurements made 24 hours after polarization.
*At 1 kHz, low field.
**Maximum operating temperature = Curie point/2.


APCI Materials available in limited supply only


Material: 840 841 850 855 856 880
Relative Dielectric Constant
KT 1250 1350 1900 3400 4100 1000
Dielectric Dissipation Factor (Dielectric Loss(%)*
tan δ 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)
ρ 7.6 7.6 7.7 7.6 7.5 7.6
Mechanical Quality Factor
Qm 500 1400 80 65 72 1000

The values listed above pertain to test specimens. They are for reference purposes only and cannot be applied unconditionally to other shapes and dimensions. In practice, components show varying values depending on their thickness, actual shape, surface finish, shaping process and post-processing.

Note: 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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