Piezoelectric Spheres & Hemispheres

Piezoceramic Hollow Spheres, Hemispheres, Focus Bowls

Fields of Application

Medical HIFU
Therapeutic Ultrasound
Sonar Transducers
Hydrophones

PI Ceramic develops and produces customer-specific semi- and hollow spheres as well as focus bowls in a variety of geometries and electrode designs, e.g. with and without contacting. From miniaturized spheres for medical technology purposes to large components for hydroacoustic applications and the generation of high-intensity focused ultrasound (HIFU), piezo spheres offer high sensitivity and durability.

Typical Configurations

Customer-Specific Designs on Request

Geometry variations e.g. collar, flattening, phases, spheres with or without hole
Focus bowls with customized diameters
Various electrode designs, e.g. wrap-around electrodes or laser structuring
Geometry-dependent setting of the frequency
Contacting by soldered strands or wires

OD Outer Diameter [mm]

ID Inner Diameter [mm]

TH Thickness [mm]

H Height [mm]

Specifications

	Hollow Spheres	Hemispheres	Focus Bowls
Material	PIC255, PIC151, PIC155, PIC181
OD [mm]	2 - 100	2 - 100	2 - 130
ID [mm]	> 1	> 1	> 1
TH [mm]	0,2 – 20 (depending on OD and ID)
H [mm]			Max. 50
Electrodes	Thick film: Ag PVD Thin Layer: CuNi, Au, Ag

Helpful Formulas

Frequency		Capacity
Radial Oscillation		Sphere
Wall-Thickness-Resonance		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*

*interpolated values