Create an Account  |   Log In

View All »Matching Part Numbers


Your Shopping Cart is Empty
         

Ultrasonic Ring Chips & Langevin Transducers


  • Designed to Produce Ultrasonic Vibrations
  • Chips Comprised of Single Layer of Hard PZT Material
  • Langevin Transducers for Ultrasonic Welding Applications
  • Resonant Frequencies from 15 kHz to 35 kHz

PA40ND5

35 kHz Ring Chip

PA40TM

26 kHz Ring Chip

PKT40A

Langevin Transducer,
20 kHz, 700 W

PKT40B

Langevin Transducer,
15 kHz, 500 W

Related Items


Please Wait
Langevin Transducer for Ultrasonic Welding
Click to Enlarge

PKT40A Langevin Transducer (Left), Connector (Center), and Sonotrode/Horn (Right)

Features

  • Chips of Hard PZT Material Designed for Ultrasonic Welding, Cleaning, Sensing, and Other Resonant Vibration Applications
  • Two Ring Chips Available with Bare Electrodes:
    • 35 kHz, 50 mm OD, 17 mm ID, and 6.5 mm Long
    • 26 kHz, 60 mm OD, 30 mm ID, and 10 mm Long
  • Langevin Transducers with Metal Housing for
    Ultrasonic Welding
  • Drive Voltage Range of 0 - 5 kV
  • Custom Options Available; Please Contact OEM Sales

Thorlabs offers hard PZT material ring elements as chips with bare electrodes for use in ultrasonic vibration applications and integrated into Langevin transducers designed for use in ultrasonic welding.

The PA40ND5 Ring Chip with 50 mm outer diameter (OD), 17 mm inner diameter (ID), and 6.5 mm thickness provides a 35 kHz resonant frequency as the work frequency; our PKT40A Langevin Transducer with four PA40ND5 chips provides a 20 kHz resonant frequency as the work frequency and an instantaneous power of 700 W. The PA40TM Ring Chip with 60 mm OD, 30 mm ID, and 10 mm thickness provides a 26 kHz resonant frequency as the work frequency; our PKT40B Langevin Transducer with four PA40TM chips provides a 15 kHz resonant frequency as the work frequency and an instantaneous power of 500 W.

The hard PZT material in these ultrasonic piezo chips and transducers can be driven at up to 5 kV, but operation above 3 kV may create an arc in the air. Protective measures such as silicone oil should be applied when the voltage is above 3 kV; for a complete list of specifications, see the tables below. We recommend driving clamped chips or transducers using a sine wave at the work frequency with a voltage of 0 - 5 kV. The graphs in the info icons in the tables below illustrate the sharp phase angle slope around the resonant frequency of the devices. The sharp phase angle slope is useful for tracking the resonant frequency which may shift during operation due to temperature changes.

Hard vs. Soft PZT Material
Soft PZT material has a large piezoelectric constant and is ideal for actuators in motion control applications. However, soft PZT has a relatively high dielectric loss factor of ~2% and would generate excessive heat when driven at high frequencies. We recommend using soft PZT actuators at less than 33% of their resonant frequency. Hard PZT material has a low dielectric loss factor and a high mechanical quality factor, making it ideal for high frequency driving and even resonant frequency driving. Driving hard PZT at its resonant frequency will generate maximum vibration amplitudes. The stroke or vibration displacement is harder to control at high frequencies, compared to soft PZT at low frequencies. The vibration of hard PZT is always used to generate vibration waves. When the resonant frequency is higher than the audible frequency range, the generated waves are termed ultrasonic waves and the device is called an ultrasonic transducer. These waves can be used for ultrasonic welding by rapid friction and heating, ultrasonic detection by wave reflection, and ultrasonic cleaning.

Piezo chips with custom dimensions, voltage ranges, and coatings are available. Additionally, customers can order these piezo chips in high-volume quantities. Please contact OEM Sales for more information.

Piezo Manufacturing

Thorlabs' In-House Piezoelectric Manufacturing

Our piezoelectric chips are fabricated in our production facility in China, giving us full control over each step of the manufacturing process. This allows us to economically produce high-quality products, including custom and OEM devices. A glimpse into the fabrication of our piezoelectric chips follows. For more information about our manufacturing process and capabilities, please see our Piezoelectric Capabilities page.

  • Build Blocks from Lead Zirconate Titanate (PZT) Powder
  • Dry Press PZT Powder into Ring Elements with Binder in a Mold
  • Purge Solvent and Binder Material Residues by Heat Treating the Elements
  • Sinter the Elements to Fuse the Piezoelectric Pressed Powder and Grow PZT Crystals
  • Lap the Elements to Achieve Tight Dimensional Tolerances: ±0.2 mm for Each Element
  • Screen Print the Outer Electrodes on the Elements
  • Align the Individual PZT Crystals Along the Same Axis by Poling the Elements

Ring Chip Operation Notes

Electrical Considerations
The electrode with the engraved '+' should be positively biased and the other electrode should be grounded. The absolute maximum voltage is 5 kV. Exceeding 5 kV will decrease the device’s lifespan and may cause mechanical failure. Reverse biasing the device may cause mechanical failure. Operating the device above 3 kV may create an arc in the air. Protective measures such as silicone oil should be applied when the voltage is above 3 kV.

When soldering wires to the electrodes, use a soldering iron at a temperature no greater than 370 °C (700 °F) for a maximum of 2 seconds per spot. Solder to the middle of the electrode, keeping the spot as small as possible.

Electrical Shock and Discharge Caution
During operation, high voltage is applied to the piezo and electrodes; do not touch the device by hand or with conductive materials to avoid injury or short circuit.

After being driven, the piezo is fully charged. Directly connecting the positive and negative electrodes may result in a spark and/or device failure. It is recommended to discharge using a resistor (>1 kΩ) between the positive and negative electrodes.

Attaching Devices to the Piezo Chip
Any epoxy which cures at a temperature lower than 80 °C is safe to use. We recommend Thorlabs Item #s 353NDPK or TS10. Loctite Hysol 9340 is also usable.

Loads should only be attached to the center of the flat faces since the edges do not translate. Attaching a load to the edges may lead to mechanical failure.

Langevin Transducer Operation Notes

Electrical Considerations
The electrode that is in contact with the metal housing should be grounded and the other electrode should be positively biased. The absolute maximum voltage is 5 kV. Exceeding 5 kV will decrease the device’s lifespan and may cause mechanical failure. Reverse biasing the device may cause mechanical failure. Operating the device above 3 kV may create an arc in the air. Protective measures such as silicone oil should be applied when the voltage is above 3 kV.

When soldering wires to the copper foil electrodes, use a soldering iron at a temperature no greater than 370 °C (700 °F) for a maximum of 2 seconds per spot, soldering to the middle of the electrode.

Electrical Shock and Discharge Caution
During operation, high voltage is applied to the piezo and electrodes; do not touch the device by hand or with conductive materials to avoid injury or short circuit.

After being driven, the piezo is fully charged. Directly connecting the positive and negative electrodes may result in a spark and/or device failure. It is recommended to discharge using a resistor (>1 kΩ) between the positive and negative electrodes.

Attaching Devices to the Transducer
Loads should only be attached to the tapped hole in the base of the metal housing. The metal housing of the transducer can be held or clamped.

Caution: When operating at the resonant frequency, high voltages will be applied to the transducer which will generate high frequency forces as well as heat. Do not touch any part of the device to avoid risk of injury from electric discharge, vibration, or heat. When operated for extended periods, cooling the piezo chips and metal components by rapid air flow is recommended.

Storage Instructions

  • Do not store the device at temperatures above 200 °C.
  • Do not store the device in humid environments. The relative humidity (RH) should be less than 40%.
  • Do not immerse the device in organic solvents.
  • Do not use the device around combustible gases or liquids.

Posted Comments:
No Comments Posted

Ultrasonic Piezo Ring Chips

These ring chips have bare electrodes with the positive pole marked by an engraved '+'; the other electrode should be connected to the negative pole of the driver or grounded. For more details, see the Operation tab.

Item #a Info Resonant
Frequencyb
Drive
Voltage
Rangec
Capacitanced Dimensions End Faces
PA40ND5 info 35 kHz 0 - 5 kV 2.3 nF ± 15% Outer Diameter: 50.0 ± 1 mm
Inner Diameter: 17.0 ± 0.5 mm
Length: 6.5 ± 0.2 mm
Screen-
Printed
Electrodes
PA40TM info 26 kHz 1.9 nF ± 15% Outer Diameter: 60.0 ± 1 mm
Inner Diameter: 30.0 ± 0.5 mm
Length: 10.0 ± 0.2 mm
  • All specifications are quoted at 25 °C, unless otherwise stated.
  • Under No Load
  • The material can be driven at up to 5 kV, but operation above 3 kV may create an arc in the air. Protective measures such as silicone oil should be applied when the voltage is above 3 kV.
  • Specified at 1 kHz, 1 VRMS.

Ultrasonic Applications

  • Thermoplastic Welding
  • Cleaning Tanks
  • Sonar & Sensing
  • Mixing & Separating
  • Vibrothermography
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PA40ND5 Support Documentation
PA40ND5Customer Inspired! Piezo Ring Chip for Ultrasonic Transducer, 35 kHz Resonant Frequency, 50 mm OD, 17 mm ID, 6.5 mm Long
$33.31
Volume Pricing
5-8 Days
PA40TM Support Documentation
PA40TMCustomer Inspired! Piezo Ring Chip for Ultrasonic Transducer, 26 kHz Resonant Frequency, 60 mm OD, 30 mm ID, 10 mm Long
$167.55
Volume Pricing
Today

Piezo Transducers for Ultrasonic Welding

Each transducer contains a discrete stack of four ring chips clamped with a bolt between two metal housings. Each stack has copper foil electrodes; the positive pole only contacts the piezo chips, while the negative pole is also connected to the metal housing, which should be connected to the negative pole of the driver or grounded. For more details, see the Operation tab. The assembly bolt at the top is tightened to a specific torque and its thread is locked; it should not be loosened or removed. The PKT40A and PKT40B transducers can be mounted via the holes in the base which have M16 x 2.0 and M20 x 1.5 taps, respectively.

Item #a Info Resonant Frequencyb Powerc Drive Voltage Ranged Capacitancee Dimensions Joint Bolt
PKT40A info 20 kHz 700 W 0 - 5 kV 10.0 nF ± 15% Diameter: 50.0 ± 1 mm
Max Width: 68.0 mm
Height: 117.0 ± 1 mm
M16 x 2.0
PKT40B info 15 kHz 500 W 9.0 nF ± 15% Diameter: 60.0 ± 1 mm
Max Width: 90.0 mm
Height: 163.0 ± 1 mm
M20 x 1.5
  • All specifications are quoted at 25 °C, unless otherwise stated.
  • Under No Load
  • Typical Instantaneous Power @ 3 kV Drive Voltage
  • The material can be driven at up to 5 kV, but operation above 3 kV may create an arc in the air. Protective measures such as silicone oil should be applied when the voltage is above 3 kV.
  • Specified at 1 kHz, 1 VRMS.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PKT40A Support Documentation
PKT40ACustomer Inspired! High-Power Ultrasonic Transducer, 20 kHz Resonant Frequency, 700 W, Ø50 mm
$218.82
Volume Pricing
Today
PKT40B Support Documentation
PKT40BCustomer Inspired! High-Power Ultrasonic Transducer, 15 kHz Resonant Frequency, 500 W, Ø60 mm
$270.00
Volume Pricing
Today
Log In  |   My Account  |   Contact Us  |   Careers  |   Privacy Policy  |   Home  |   FAQ  |   Site Index
Regional Websites:East Coast US | West Coast US | Asia | China | Japan
Copyright © 1999-2020 Thorlabs, Inc.
Sales: 1-973-300-3000
Technical Support: 1-973-300-3000


High Quality Thorlabs Logo 1000px:Save this Image