Piezo Bender
Piezo bender is a bending element that utilizes the inverse piezoelectric effect of piezo ceramics to generate lateral displacement under the driving force of an electric field.
Structurally, it adopts a double layered structure, with two layers of piezo ceramic sheets arranged in the same polarization direction and tightly bonded to the middle electrode layer.
Under the driving force of an alternating power source, it generates corresponding vibration amplitude and is applied in micro displacement driving devices.
Product Mix
The piezo benders consist of two piezo ceramic sheets and one metal sheet, arranged in the order of piezo ceramic sheets, metal sheets, and piezo sheets.
The piezo benders have a non actuation region (no piezoelectric effect, no displacement) and an actuation region (with piezoelectric effect, displacement).
The non actuation region can be used for fixation, but do not fix the metal electrode part to avoid short circuits or electrical connections.
The piezo bender has three electrode points. The structure is shown in the following figure.
Features
- Piezo Bender(stack, without wire)
- Utilizing the inverse piezoelectric effect of piezo ceramics
- A double layered structure
- Applied in micro displacement driving devices
Specification
Technical Data
| Type | Driving voltage [DC V] | Size [mm]±10% | Actuating length [mm] | Capacitance/ partition [nF]±20% | Unidirectional displacement [mm]±20% | Blocking force [N] | Stiffness [N/μm]±20% |
| MTP60╳20╳0.7 | 150 | 60╳20╳0.7 | 53 | about120 | ≥2.6 | ≥0.50 | 0.0002 |
| MTP49╳2.3╳0.8 | 200 | 49╳2.3╳0.8 | 38 | about12 | ≥1.5 | ≥0.15 | 0.0001 |
| MTP35╳2.1╳0.7 | 200 | 35╳2.1╳0.7 | 28 | about10 | ≥1.4 | ≥0.14 | 0.0001 |
Piezo Material Parameters
| Attribute | Units | PZT5 |
| Dielectric performance (tolerance ±10%) | ||
| Dielectric loss factor | ƐT33/Ɛ0 | 3300 |
| tgδ [%] | 2.2 | |
| Mechanical and electrical performance (tolerance ±5%) | ||
| Coupling coefficient | Kp | 0.68 |
| K31 | 0.37 | |
| K33 | 0.63 | |
| Kt | 0.5 | |
Piezoelectric charge constant | d31 [10-12C/N] | -320 |
| d33 [10-12C/N] | 710 | |
| g31 [10-3V/N] | -11 | |
| g33 [10-3V/N] | 25 | |
| Frequency constant | NEp [m/s] | 2010 |
| NDt [m/s] | 1950 | |
| NE1 [m/s] | 1400 | |
| ND3 [m/s] | 1500 | |
| Physical performance (tolerance ±5%) | ||
| Mechanical quality factor | Qm | 60 |
| Density | ρ [103kg/m3] | 7.7 |
| Elastic compliance constant | SE11 [10-12m2/N] | 17 |
| SE33 [10-12m2/N] | 23 | |
| Curie temperature | Tc [° C] | 230 |
| Process attributes | ||
| Sintering temperature | Ts [° C] | 985 |
