Construction of Piezo Cylinders
The standard construction material for our piezo cylinders,
APC 850-E ceramic, is a variation of our APC 850 ceramic,
specially formulated for cylinders. APC 850 material is a high
density, fine grain, soft PZT ceramic that exhibits a high
dielectric constant, high electromechanical coupling, high
charge sensitivity, and a high Curie point. Clean, noise-free
responses make this ceramic a material of choice for low-power
sensing devices:
- ultrasonic or Doppler flow meters
- gas flow sensors
- other flow or level sensors
- sensors for ultrasonic NDT / NDE applications
- sensors for inspecting construction materials, welds, etc.
in automotive, structural, or other products
Alternatively, APC 850 ceramic is an excellent material for
high performance transducers for medical imaging applications.
Performance Characteristics of APC 850-E and APC 850
Ceramics
| Characteristic |
APC
850-E |
APC
850 |
| Relative Dielectric Constant
/K |
1800 |
1750 |
Dielectric Dissipation
Factor / tan
(%) |
2.0 |
1.4 |
| Curie Point / TC
(°C) |
300 |
360 |
| Electromechanical Coupling
Factor / k31 (%) |
>0.35 |
0.36 |
| Piezoelectric
Charge Constant (pC/N) |
| d33 |
330 |
400 |
| -d31 |
175 |
175 |
Density / 
(g/cm3) |
7.5 |
7.7 |
| Mechanical Quality Factor /
Qm |
85 |
80 |
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