100 Billion Cycles – Can an Actuator be Designed to Provide this Kind of Reliability!
1. Ceramic-insulated, cofired high-performance piezo stacks outlast polymer-insulated types
The short answer is yes. However, before the advent of monolithic, cofired and ceramic encapsulated piezo actuators, the reliability of piezo ceramics was strongly dependent on the environmental conditions at the site of application. For actuators with conformal coatings, humidity, temperature and operating voltage are of considerable influence, since no polymer insulation exists that is absolutely impermeable. For these devices the life expectancy can decrease dramatically at high humidity. Ingressing moisture and the electric field applied can then cause chemical reactions in the component, which are accelerated by higher temperature. The result is initially an increased leakage current and finally a dielectric breakdown, that is a short circuit between the electrodes. During dynamic operation, the service life of the piezo ceramics can be affected by dynamic forces and alternating mechanical stress conditions. Poorly designed ceramic actuators can be affected by micro cracks leading to failure quickly in such cases.
Piezoelectric ceramic microdisplacer, features:
Good linearity
2. Good repeatability
3. Small delay,
4. Fast response,
5. Features such as strong stability,
It is a precision electric drive displacement device.
Can be used as
1. Polarization control,
2. Laser tuning,
3. Focusing,
4. Fine tuning of optical instruments
5. Optical switch,
6. Coupling adjustment of optical fiber and optical current,
7. Precision machine tool adjustment
8. Micro-motion platform adjustment and other fields
Part numbering
Dimensions
Specification
|
|
Dimensions |
Nominal displacement |
Blocking force |
Stiffness |
Electrical capacitance |
Resonance Frequency |
| OD/H |
[µm@150V] |
[N@150V] |
[N/µm] |
[µF] |
[kHz] |
| [mm] |
±10% |
|
|
±20% |
±20% |
| HMY15014831 |
Φ14/79 |
83 |
7500 |
85 |
43 |
19 |
| HMY15014241 |
Φ14.2/24 |
24 |
7500 |
312 |
16 |
62 |
| HMY15014481 |
Φ14.2/48 |
48 |
7500 |
156 |
30 |
31 |
| HMY15014201 |
Φ14.7/20 |
20 |
7500 |
375 |
13 |
75 |
| HMY15014401 |
Φ14.7/40 |
40 |
7500 |
188 |
27 |
37.5 |
| HMY15014801 |
Φ14.7/80 |
88 |
7500 |
85 |
50 |
18 |
* Customize on request.
| Key Technical Index |
Unit |
Value |
| Relative dielectric constant εr3T |
- |
3500±20% |
| Electromechanical coupling factor Kp |
- |
70% |
| Longitudinal piezoelectric strain coefficient d33 |
10-12C/N |
≥650 |
| Piezoelectric voltage constant g33 |
10-3Vm/N |
17 |
| Elastic flexible coefficient S11E |
10-12m2/N |
14.3 |
| Elastic flexible coefficient S33E |
10-12m2/N |
18.5 |
| Dielectric loss tgδ |
10-3 |
≤1.5 |
| M quality factor Qm |
- |
45 |
| Curie temperature TC |
℃ |
240 |
| Density ρ |
g/cm3 |
7.9 |
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· we will give you the tracking number after we send out the goods, in general, you will receive the goods within five days.
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