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Piezoelectric Transducer Crystals

Transducer crystals are custom made to order from Quartz, Lithium Niobate, Tourmaline, Gallium Orthophosphate or Lead Zirconate Titanate (PZT)

Transducers themselves are used in many applications, such as ultrasonic pressure measurement, level sensing, distance sensing, micro-positioning, non-destructive testing of solids and acousto-optical experiments

Soldered wire leads, suitable to the size and frequency of the crystals, are available.

Shape can be :

round
square
rectangular
triangular and wedged
cone
tube
cylinder
spherical
annular

Standard Finishes
Fundamental Operation	3 micron fine lapped
Overtone Operation	proprietary chemical polish (flatness and parallelism will vary)

General Specifications

Material	Mode of Vibration	Fundamental Frequency Range	& Tolerances	Typical Flatness	Typical Parallelism	Minimum Diameter	Maximum Diameter
Quartz	Compressional, Shear, Length Extensional, Torsional	50 KHz - 100 MHz	± 5%	To within 0.00002"	To within 0.00005"	0.02"	8"
Lithium Niobate	Compressional, Shear, Triple Mode	250 KHz - 40 MHz	± 5%	To within 0.00002"	To within 0.00005"	0.02"	6"
Lead Zirconate Titanate	Compressional, Shear, Dual Mode	100 KHz - 30 MHz 40 MHz	± 5% ± 10%	To within 0.00005"	To within 0.000015"	0.02"	6"

Vacuum-deposited Electrodes enable the best possible frequency match in a diversity of patterns. These thin (≈ 3000Å) electrodes maintain the flatness, parallelism and surface quality of the crystals and do not overload thin, high frequency crystals.

Standard electrodes are vacuum-deposited chrome/gold, chrome/silver, chrome, copper, titanium, and aluminium.

Electroless nickel, copper and gold, and fired palladium/silver, silver, gold and platinum/gold are also available

Numerous individual patterns, and custom masks can be made to your specifications.