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| APC Material: | 840 | 841 | 850 | 855 | 880 |
| Navy Type Equivalent | Navy I | -- | Navy II | Navy VI | Navy III |
| Relative Dielectric Constant | |||||
| KT | 1250 | 1350 | 1900 | 3300 | 1000 |
| Dielectric Dissipation Factor (Dielectric Loss(%)* | |||||
| tan δ | 0.40 | 0.35 | 1.40 | 1.30 | 0.35 |
| Curie Point (°C)** | |||||
| Tc | 325 | 320 | 360 | 250 | 310 |
| Electromechanical Coupling Factor | |||||
| kp | 0.59 | 0.60 | 0.63 | 0.68 | 0.50 |
| k33 | 0.72 | 0.68 | 0.72 | 0.76 | 0.62 |
| k31 | 0.35 | 0.33 | 0.36 | 0.40 | 0.30 |
| k15 | 0.70 | 0.67 | 0.68 | 0.66 | 0.55 |
| Piezoelectric Charge Constant (10-12 C/N or 10-12 m/V) | |||||
| d33 | 290 | 300 | 400 | 630 | 215 |
| -d31 | 125 | 109 | 175 | 276 | 95 |
| d15 | 480 | 450 | 590 | 720 | 330 |
| Piezoelectric Voltage Constant (10-3 Vm/N or 10-3 m2/C) | |||||
| g33 | 26.5 | 25.5 | 24.8 | 21.0 | 25.0 |
| -g31 | 11.0 | 10.5 | 12.4 | 9.0 | 10.0 |
| g15 | 38.0 | 35.0 | 36.0 | 27.0 | 28.0 |
| Young's Modulus (1010 N/m2) | |||||
| YE11 | 8.0 | 7.6 | 6.3 | 5.9 | 9.0 |
| YE33 | 6.8 | 6.3 | 5.4 | 5.1 | 7.2 |
| Frequency Constants (Hz*m or m/s) | |||||
| NL (longitudinal) | 1524 | 1700 | 1500 | 1390 | 1725 |
| NT (thickness) | 2005 | 2005 | 2040 | 2079 | 2110 |
| NP (planar) | 2130 | 2055 | 2080 | 1920 | 2120 |
| Density (g/cm3) | |||||
| ρ | 7.6 | 7.6 | 7.6 | 7.7 | 7.6 |
| Mechanical Quality Factor | |||||
| Qm | 500 | 1400 | 80 | 65 | 1000 |
| APC Material: | 842 | 844 |
851 |
881 |
| Relative Dielectric Constant | ||||
| KT | 1375 | 1500 |
1950 |
1030 |
| Dielectric Dissipation Factor (Dielectric Loss(%) | ||||
| tan δ | 0.45 | 0.40 |
1.50 |
0.40 |
| Curie Point (°C) | ||||
| Tc | 325 | 320 |
360 |
310 |
| Electromechanical Coupling Factor | ||||
| kp | 0.65 | 0.68 |
0.71 |
0.58 |
|
kt |
0.48 |
0.48 |
0.51 |
0.46 |
| Piezoelectric Charge Constant (10-12 C/N or 10-12 m/V) | ||||
| d33 | 300 | 300 |
400 |
220 |
| Piezoelectric Voltage Constant (10-3 Vm/N or 10-3 m2/C) | ||||
| g33 | 26.3 | 24.5 |
24.8 |
26.7 |
| Young's Modulus (1010 N/m2) | ||||
| YE11 | 8.0 | 7.6 |
6.3 |
9.0 |
| YE33 | 6.8 | 6.3 |
5.4 |
7.2 |
| Frequency Constants (Hz*m or m/s) | ||||
| NT (thickness) | 2050 | 2050 |
2040 |
2050 |
| NP (planar) | 2230 | 2250 |
2080 |
2300 |
| Density (g/cm3) | ||||
| ρ | 7.6 | 7.7 |
7.6 |
7.6 |
| Mechanical Quality Factor | ||||
| Qm | 600 | 1500 |
80 |
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, piezoelectric materials 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, 851, 855, Type VI VDC ~2X.
9-11 VAC /mil for 840, 841, 842, 844, 880, 881 VDC ~2X.
*At 1 kHz, low field.
**Maximum operating temperature = Curie point/2.
Standard Tolerances (Tighter tolerances avaliable on request)
- Capacitance: ±20%
- d33 Value: ±20%
- Frequency: ±5% (to ±0.5% on request)
For more information about APC International’s piezoelectric materials please consult the following:
