The standard construction material for our piezo cylinders, Type II ceramic, is a variation specially formulated for cylinders. This Type II 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, Type II ceramic is an excellent material for high performance transducers for medical imaging applications.
Performance Characteristics of Type II Ceramic Material
| Characteristic | Type II |
| Relative Dielectric Constant/K | 1800 |
| Dielectric Dissipation Factor / tanδ (%) | 2.0 |
| Curie Point / TC (°C) | 300 |
| Electromechanical Coupling Factor / k31 (%) | >0.35 |
| Piezoelectric Charge Constant (pC/N) | |
| d33 | 330 |
| -d31 | 175 |
| Density / ρ (g/cm3) | 7.5 |
| Mechanical Quality Factor / Qm | 85 |