Piezoceramic Spheres, Hemisphere PZT Ultrasonic Transducers

Piezoceramic Hollow Spheres, Hemispheres, Focus Bowls

Piezoceramic spheres and hemispheres from PI. Ceramic come in in different sizes, materials and electrode configurations and can be used in therapeutic medical ultrasound, and SONAR applications.

Piezo micro spheres are available with outer diameters as low as 2mm and wall thickness as thin as 200µm.

High Performance Spherical Ultrasound Transducers – Where Are They Used?

PI develops and produces high quality piezoelectric transducers for sensing and ultrasound applications such as data communications, therapeutic medical ultrasound, and SONAR. Piezo spheres, hemispheres and focus bowls are available in a variety of geometries and electrode designs. Material choices include hard PZT and soft PZT formulations, e.g. PIC255, PIC151, PIC155, and PIC181.

Micro Spheres and Standard Spheres

For our piezo micro spheres, inner diameters start as small as 1mm. Standard spheres and piezo focus bowls are available with outside diameters up to 130mm. Applications for spherical ultrasound transducers range from medical technology (miniature spheres) to hydroacoustic applications (large spheres) and high-intensity focused ultrasound generation (HIFU). PI Ceramic piezoelectric ultrasonic transducers offer high sensitivity and durability. For resonant frequency and radial oscillation calculations, see formulas below.

Frequency

Radial Oscillation

Wall-Thickness-Resonance

Capacity

Sphere

Hemisphere

With

Frequency Constants

	N_p (sphere)
Soft-PZT
PIC 151	1900
PIC 152	2000*
PIC 153	1900*
PIC 155	1800*
PIC 255	1600
Hard-PZT
PIC 144	1950*
PIC 184	2000*
PIC 241	2000*
Hard-PZT (high Q_m)
PIC 181	2000
PIC 300	1950*