Piezoelectric Composite Elements

Piezoelectric Composite Elements

Piezoelectric composites provide the advantage of wider bandwidth and reduction or elimination of unwanted modes of vibration in low frequency transducers. These configurations are particularly advantageous in applications where low aspect ratios are a necessity due to conficting requirements of beam angle and operating frequency.

SensorTech manufactures piezoelectric composite elements for ready insertion into your transducer housing. The elements are provided with acoustic pressure release materials bonded to the elements. Two wires or solder lugs provide for easy electrical connection. SensorTech will also be happy to integrate them into a transducer housing and calibrate the transducers if necessary. SensorTech can also customize the elements to suit your requirements for beam angle and frequency and other requirements. Please contact our technical support for further details or to discuss your specific needs.

Piezoelectric Composites
 
Resonance Frequency   (Fr kHz) 90 100 100 100 145 145 180 180 300 400 500
Antiresonance Frequency   (Fa kHz) 109 125 128 125 175 175 223 240 418 510 620
Impedance at (Fr Ohms) 100 220 1000 250 2500 2500 1600 750 15 16 20
keff 0.56 0.60 0.62 0.60 0.56 0.56 0.59 0.66 0.70 0.62 0.59
Capacitance (pF) 170 600 190 520 400 400 300 480 9,500 10,000 1,200
Dissipation Factor (%) 0.005 0.005 0.02 0.008 0.02 0.02 0.008 0.008 0.005 0.007 0.015
Beam Angle (degrees) 45 25 45 30 35 35 35 30 4 2.5 6.5
Length (mm) 21 20 20 20 14 14 12 12 5 8 5
Radiating Face (mm) 23 40 20x20 32x32 18 18 15 16x16 80 85 28