Jiakang Bolt-Fastening Type Transducers
The piezoelectric components are bolted to the metal rod, allowing the particle displacement or velocity of the mechanical vibration of the piezoelectric components to be amplified, while ultrasonic energy is concentrated on a smaller area, known as the ultrasonic concentrator. We offer a wide range of ring-shaped components with low resonant impedance, low dielectric loss, excellent thermal stability, and high power drive.Main Parameters
| Part Number | HTCH |
| External Diameter | φ10～φ70(φ10、φ20、φ35,φ50）mm |
| Internal Diameter | φ5～φ35(φ5、φ8、φ15、φ17)mm |
| Thickness | 2.5、3.0、4.0、5.5mm |
| Electromechanical Coupling Coefficient (Kp) | 0.65 |
| Resonant Impedance | ≤50Ω |
| Resonant Frequency | 30～200kHz |
| Recommended Material | P-669、P-679 |
Main Materials
| Electrical Data | Symbol | Main Materials | ||||||||||||||
| P-659 | P-660 | P-663 | P-664 | P-666 | P-667 | P-668 | P-669 | P-672 | P-673 | P-676 | P-678 | P-679 | P-690 | |||
| Piezo-electric coupling coefficient | kp | 0.58 | 0.70 | 0.67 | 0.67 | 0.78 | 0.10 | 0.68 | 0.62 | 0.70 | 0.68 | 0.7 | 0.72 | 0.65 | 0.74 | |
| k31 | 0.32 | 0.39 | 0.38 | 0.37 | 0.42 | 0.39 | 0.35 | 0.41 | 0.39 | 0.45 | 0.42 | 0.38 | 0.40 | |||
| k33 | 0.60 | 0.73 | 0.70 | 0.70 | 0.78 | 0.70 | 0.68 | 0.72 | 0.70 | 0.80 | 0.72 | 0.70 | 0.75 | |||
| kt | 0.42 | 0.46 | 0.45 | 0.45 | 0.50 | 0.45 | 0.46 | 0.44 | 0.46 | 0.46 | 0.50 | 0.47 | 0.46 | 0.48 | ||
| Relative dielectric constant | εT33 / ε0 | 1100 | 3200 | 2200 | 2800 | 4500 | 180 | 2300 | 1400 | 3400 | 2200 | 6000 | 2750 | 1600 | 3800 | |
| Piezo-electric charge constant |
d33×10-12C/N |
280 | 700 | 400 | 480 | 780 | 70 | 430 | 250 | 600 | 430 | 850 | 540 | 320 | 710 | |
|
d31×10-12C/N |
-120 | -350 | -200 | -350 | -230 | -130 | -280 | -230 | -420 | -260 | -150 | -360 | ||||
| Mechanical quality factor | Qm | 100 | 60 | 80 | 500 | 60 | 2500 | 90 | 1000 | 80 | 90 | 60 | 80 | 1000 | 70 | |
| Frequency constant |
fr·d kHz·cm |
230 | 190 | 200 | 220 | 180 | 200 | 230 | 190 | 200 | 180 | 190 | 230 | 190 | ||
|
fr·t kHz·cm |
210 | 200 | 200 | 225 | 200 | 225 | 200 | 200 | ||||||||
| Temp charac-teristics |
| TKfr | (-20℃~80℃) |
100 | 260 | 300 | 120 | 400 | 30 | 150 | 100 | 300 | 100 | 400 | 200 | 100 | 260 | |
|
| TKCT | (-20℃~80℃) |
1500 | 4500 | 5000 | 2500 | 6000 | 1800 | 1500 | 4000 | 2000 | 6000 | 3000 | 1500 | 4000 | |||
| Curie Temp. |
Tc
|
320 | 220 | 220 | 230 | 180 | 450 | 355 | 340 | 230 | 325 | 140 | 280 | 330 | 210 | |
| Dielectric loss |
tgδ（%）
|
1.20 | 1.80 | 2.00 | 0.50 | 2.60 | 0.70 | 2.00 | 0.30 | 2.30 | 2.00 | 2.60 | 1.50 | 0.40 | 1.80 | |
| Dielectric loss | tgδ（400V/mm，%） | 1.00 | 1.00 | |||||||||||||