The piezoelectric PMN-PT crystals with compositions near but not to close to the MPB
exhibit anomalously
high dielectric and piezoelectric properties making them candidates for a broad range of
applications in acoustic transduction devices such as actuators, sensors, ultrasonic imaging
transducers, underwater acoustics, active vibration control, transformers, optics, and bulk
acoustic wave devices for telecommunications.
There are mainly four types of piezoeletric effects for applications:
- LE: Longitudinal Extension
- TE: Transvers extension
- LS: Longitudinal Shear
- TS: Transverse Shear
4 types of piezoelectric effect give 18 configuration of strain-poling relations
|
Strain |
1 | 2 | 3 | 4 | 5 | 6 |
Polarization |
1 |
LE | TE | TE |
LS | TS | TS |
2 |
TE | LE | TE |
TS | LS | TS |
3 |
TE | TE | LE |
TS | TS | LS |
The best piezoelectric coefficients of PMN-PT crystals with PT-content 27~33% are:
d33 2000~3000 pC/N with <001> poling,
d31 -1200~-1800 pC/N fro for <011> poling,
d36 2500 pC/N fro for <011> poling,
and d15 4000~6000 pC/N with <111> poling
| TE | LE | LS | TS |
<001> poling |
d31/d32 -800 ~ -1000 pC/N |
d33 2000 ~ 3000 pC/N
k33 > 0.90 |
d36 0 |
d15, d24 < 100 |
<011> poling |
d31 -1200 ~ -1800 pC/N
k31 ~ 0.84 -0.90 |
d33 < 500 pC/N |
d36 2500pc/N |
d15, d24 2000 ~ 3500 pC/N
k15 > 0.9 |
<111> poling |
d31, d32 < 150 pC/N |
d33 < 200 pC/N |
d36 0 |
d15/d24
4000 ~ 7000 pC/N k15 > 0.95 |
Comparison between PMN-PT Crystal and PZN-5H Ceramics
|
d31 |
d33 |
d36 |
d15 |
PMN-PT Crystals |
-1200 ~ 1800 pC/N
k31 : 0.84 ~ 0.90 zxt - 0 cut |
2000 ~ 3000 pC/N
k33 > 0.90 zxt - 0 cut |
2000 ~ 2500 pC/N
k36 > 0.90 zxt - 45 cut |
4000 ~ 7000 pC/N
k15 > 0.95 xzt - 22.5 cut |
PZN-5H Ceramics |
-274 pC/N k31 : 0.39 |
593 pC/N k33 : 0.75 |
0 0 |
741 pC/N k15 : 0.68 |
479 Quadrangle Drive, Suite E, Bolingbrook, IL 60440, USA
Phone: (630) 226-9080 Fax: (630) 226-9010 Toll free (866) 909-8061
For more information or to contact sales: piezosales@ctscorp
|