Advanced Electro Ceramics

Piezoelectric Staves

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

CeramTec’s Global Electroceramics Division specialises in the development and production of various rings sizes, bearing variety of electrode and metallisation configurations. This variety of tubes is fabricated from 33 published and additional custom in-house piezoelectric material formulations to address needs such as high power, sensitivity, stability in cryogenic temperatures as also in high temperatures and extreme pressure imposing applications.

Applications include

  • Free Flooded Rings (FFR)
  • HIFU therapeutic treatment
  • Nebulisers
  • Scientific equipment

Features

  • Choice of metallisation (Silver, Nickel, Gold and others on request)
  • Evaporated and chemically deposited metallisation's available
  • Thickness/Radial frequency tuning available on request
  • Wrap around electrode configuration
  • Wide choice of PZT formulations

Typical Stave Configurations

Barrel Wedge

Other custom stave design in combination with electrode configurations and metallisation’s are available on request.

Dimensional Range

  From To
Barrel Design
Outside Diameter 8mm (0.3”) 150mm (5.9”)
Inside Diameter 6mm (0.24”) 140mm (5.5”)
Length 1mm (0.039”) 150mm (5.9”)
Stave Design
Length 1mm (0.039”) 150 (5.9”)
Width 8mm (0.3”) 25.4mm (1”)
Thickness 5mm (0.2”) 25.4mm (1”)

Parts can be produced to the size ranges shown, but not in every combination of dimensions expressed above. Tighter or wider dimension/tolerance can be reviewed on a request basis depending on application.

Standard Mechanical Tolerances

   
Notes: (*) Barrel design, (**) Wedge design
Outside Diameter (*) ±0.150mm
Inside Diameter (*) ±0.150mm
Length (**) ±0.05mm
Width (**) ±0.150mm
Thickness (**) ±0.05mm
Angle ±0.25°

Tighter mechanical tolerances are achievable but are dependent on the ring inside and outside diameters and thickness.

Metallisation Type

   
Silver fired thick film Evaporated Nickel
Electroless nickel Gold flash
Tin Evaporated Gold and others available on request

Typical Impedance Responce Trace

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.

Ceramic Testing

Appropriate statistical methods ranging from AQL’s to 100% testing are used on electrical parameters in accordance with EN-50324-1. A brief summary is provided in hard copy and typically includes low field measurements of capacitance, tan delta and the main parameters used to determine piezoelectric activity. Procedures other than this can be negotiated, and additional data requirements (electronic format, sample quantity, etc) are available on request.

There is more to discover…

With the acquisition of the Electro-Ceramics Division from Morgan Technical Ceramics, CeramTec has broadened its already extensive range of piezo-ceramic materials and products.

Discover the wide portfolio and expert know-how.

Recommended Contacts

Please click on the button “Contacts” to the right, to get a list with the personal and direct responsible contacts within the CeramTec Group.