Advanced Electro Ceramics

Piezoelectric Discs

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 Electroceramics Divisions specialise in the development and production of various discs sizes, electrode and metallisation configurations. This range is fabricated from 33 available piezoelectric material formulations to respond to the ever growing challenges on new applications.

Applications include

Acoustic emission sensors
NDT transducers
Liquid and Gas flow sensors
Parking sensors
Micro-pump actuators
Liquid level sensors

Features

Sizes from 1mm up to 254mm
Thickness from 80μm up to 25.4mm
Choice of metallisation (Silver, Nickel, Gold and others on request)
Evaporated and chemically deposited metallisation’s available including Gold over Nichrome and electroless nickel
Thickness frequency tuning available on request
Wide choice of PZT formulations

Electrode Configurations

Disc with Nickel Electrodes	Disc with straight wraparound electrode	Disc with circular wraparound electrode	Disc with annular wraparound electrode

Other custom electrode configurations are available on request.

Dimensional Range

	From	To

Diameter	1mm (0.04”)	254mm (10”)
Thickness	0.08mm (0.003”)	25.4mm (1”)

Parts can be produced to the size ranges shown, but not in every combination of diameter and thickness dimensions.

Standard Mechanical Tolerances



Diameter	±0.150mm
Thickness	±0.05mm

Tighter mechanical tolerances are achievable but are dependent on the disc diameter and thickness.

Metallisation Type



Silver fired thick film	Evaporated Nickel
Electroless nickel	Gold flash
Gold over Nichrome	Evaporating and others available on request

Typical Impedance Response Trace

Useful Equations



	Capacitance
	Radial frequency
	Thickness frequency
	Static displacement
	Voltage (static)
	Effective coupling factor
	Planar coupling factor
	Mechanical quality factor

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.