Piezoelectric Rings

CeramTec is a leader in the design and manufacture of complex piezoelectric ceramic components and assemblies used in a wide range of applications and cutting edge technologies.

Applications include


  • Acceleration sensors (wheel balancing machine)
  • Knock sensors

Industrial Applications

  • Actuators
  • Inkjet printing
  • Ultrasonic cleaning
  • Ultrasonic machining
  • Ultrasonic welding  

Medical Technology

  • Phacoemulsification
  • Plaque removal
  • Surgical knives
  • Ultrasonic medical tools
  • Ultrasonic nebulizers

Security & Protection

  • Sonar technology & hydroacoustics
  • Standard metallisation: silver electrodes 
  • Evaporated and chemically deposited metallisation's available
  • Thickness/Radial frequency tuning available on request
  • Wide choice of piezoceramic formulations
Typical Electrode Configurations


Flat Lapped Silver

Electrode with insulating rim inside and outside

Other custom electrode configurations are available on request. Rings are supplied on request with a ‘break edge’ on outside and inside diameters.

Dimensional Range
  • Outside Diameter from 2mm (0.08”) to 150mm (5.9”)
  • Inside Diameter from 1mm (0.04”) to 140mm (5.5”)
  • Thickness from 0.15mm (0.006”) to 25mm (1”)

Custom sizes dimensions outside of the above may be possible – please consult for further information.

Standard Mechanical Tolerances
  • Outside Diameter ± 0.150mm
  • Inside Diameter ± 0.150mm
  • Thickness ± 0.05mm
  • Flatness 0.002**/0.012mm MAX (** lapped silver or sputtered)
  • Parallelism 0.007**/0.012mm MAX (** lapped silver or sputtered)
  • Concentricity 0.2mm

Tighter mechanical tolerances are achievable but are dependent on the geometry.

Metallisation Type
  • Silver fired thick film standard - Silver fired thick film flat lapped
  • Electroless nickel - Gold flash
  • Tin - Evaporated Gold, Nickel and others available on request
Typical Impedance Responce Trace (Radial Resonance)

The above is a typical impedance trace measured on a dedicated analyser and depicting the resonance and anti-resonance points associated with the ring shaped component. This data allows the calculation of piezoelectric activity and other important characteristics required for the application.

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