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| 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. |