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Home > Products > PZT Piezoelectric Elements > PZT Piezoelectric Cylinders/Tubes > Piezoelectric Tube 28KHz for Underwater Acoustic Transducer

Piezoelectric Tube 28KHz for Underwater Acoustic Transducer

Piezoelectric Tube 28KHz for Underwater Acoustic Transducer

Basic Info

    Model No.: OD34 x ID30 x 20mm PZT-51

Product Description

Piezoelectric ceramic tubes

Electrode direction: Radial direction



Applications: underwater ultrasonic receiver transducer


Transducers are devices that convert sound energy to electricity (or two different forms of energy). Most of the underwater acoustic transducers/equipments use electro-acoustic conversion, because this conversion mode is most convenient for manual control. The transducer used underwater is called underwater acoustic transducer.

The ultrasonic transducer is called the transmitting transducer, which generates electrical signals from the electronic oscillator to excite the transducer to produce mechanical vibration, and thus propels the water medium to emit acoustic waves into the water. Conversely, the transducer that generates vibration under the excitation of sound wave and converts sound energy into electricity is called receiving transducer or hydrophone.


Normally Piezo Ceramic components used in underwater acoustic transducer/hydrophone is piezo tubes, Piezo Sphere or piezo Trapezoid strip.


Material: PZT-52 ( equal to PZT-5A)


PZT-52 has high sensitivity, permittivity, and time stability in applications when used as the receiver or generator element in accelerometers, vibration pickups, and hydrophones. Applications




Technical data:

Dimensions: OD 34mm, ID30mm, height 20mm

Radial Frequency Fr: 28KHz ± 1KHz

Electromechanical coupling coefficient K31: >0.36

Dielectric Loss tg δ: <2.00%

Static capacitance Cs: 23280pF± 12.5%


Test Condition: 25±3 °C 40~70% R.H.
fr, Zm, Kr => Radial mode vibration
Cs tanδ => LCR meter at 1KHz 1Vrms


Yuhai company can provide the piezo materials for underwater acoustic transducers:


"Soft" PZT materials
Properties PZT-51 PZT-52 PZT-53 PZT-5H PLiS-51
Dielectric Constant ɛTr3 2200 2400 2600 3200 2000
Coupling factor KP 0.62 0.63 0.64 0.68 0.62
K31 0.35 0.35 0.36 0.38 0.35
K33 0.68 0.7 0.7 0.76 0.7
Kt 0.5 0.5 0.5 0.52 0.52
Piezoelectric coefficient d31 10-12m/v -186 -204 -227 -275 -197
d33 10-12m/v 500 520 550 620 450
g31 10-3vm/n -9.6 -9.8 -9.9 -9.7 -11.1
g33 10-3vm/n 25.6 24.5 23.9 22 25.4
Frequency coefficients Np 1980 1980 1960 1900 1920
N1 1451 1451 1437 1393 1407
N3 1900 1900 1755 1550 1925
Nt 2150 2150 2150 2100 2100
Elastic compliance coefficient Se11 10-12m2/n 16.7 17 17.4 18 18
Machanical quality factor Qm 80 75 75 70 80
Dielectric loss factor Tg δ % 2 2 2 2 2
Density ρ g/cm3 7.6 7.6 7.6 7.5 7.5
Curie Temperature Tc °C 270 270 270 230 345
Young's modulus YE11 <109N/m3 60 59 57.5 56 56
Poison Ratio 0.36 0.36 0.36 0.36 0.36

"Hard" PZT materials
Properties PZT-41 PZT-42 PZT-43
Dielectric Constant ɛTr3 1050 1250 1420
Coupling factor KP 0.58 0.58 0.58
K31 0.32 0.33 0.34
K33 0.66 0.67 0.68
Kt 0.48 0.48 0.48
Piezoelectric coefficient d31 10-12m/v -106 -124 -138
d33 10-12m/v 260 280 300
g31 10-3vm/n -11.4 -11.2 -11
g33 10-3vm/n 28 25.3 24
Frequency coefficients Np 2280 2200 2160
N1 1671 1613 1583
N3 1950 1900 1875
Nt 2250 2200 2200
Elastic compliance coefficient Se11 10-12m2/n 11.8 12.7 13.2
Machanical quality factor Qm 1000 800 600
Dielectric loss factor Tg δ % 0.3 0.4 0.5
Density ρ g/cm3 7.5 7.5 7.5
Curie Temperature Tc °C 320 320 320
Young's modulus YE11 <109N/m3 85 79 76
Poison Ratio 0.3 0.3 0.3



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