Specialists in Piezoelectric Testing
Radiant Technologies, Inc. specializes in the measurement of electrical and piezoelectric properties of non-linear materials for both thin films and bulk ceramics. The Piezoelectric Task captures a sample's displacement as a function of voltage profile along with the sample's polarization response. An external displacement measurement instrument must be attached to a Radiant Precision Test System to make this measurement. All of Radiant's testers are equipped with a high-impedance voltage input to capture the output of a displacement sensor. Every Vision measurement task will collect data from that sensor input simultaneously with the measurement being executed.
Radiant offers the following piezoelectric bulk ceramic test fixtures:
- AutoCal 230C (D33) Piezoelectric Thermal Test Chamber
- Non-Heated Bulk Ceramic (D33) Piezoelectric Test Bundle
Radiant's test systems work easily with displacement sensors which include:
- non-contact optical sensors;
- laser vibrometers; and
- atomic force microscopes
- Radiant's piezoelectric bundles
Radiant offers the following piezoelectric thin film test fixtures and bundles:
- e31-Thin Film, Piezoelectric Test Bundle
- Polytec/Radiant Thin Film Piezoelectric Test Bundle - NLV
- Precision Nano Displacement System - PNDS which is an economical AFM.
Radiant's Thin Film Piezoelectric Bundle Options
Radiant offers three different Thin Film Piezoelectric Test Bundles that accurately determine coefficients for piezoelectric thin films. These tools enable the characterization and control of piezoelectric films during product development and manufacturing.
A Laser Vibrometer attached to a Radiant Test System accurately measure the piezoelectric coefficients (d33 and e31) of thin piezoelectric films deposited on cantilevers and membranes or clamped to a substrate. e31 can be measured with the addition of Radiant’s e31 Test Fixture.
Radiant’s PiezoMEMS Analyzer, Multiferroic II and Precision LCII Testers use 18-bit ADC’s, have 76 microvolt per bit resolution, and exhibit a noise floor of~300µV for a single pass.
A Radiant Test System Combined with a Laser Interferometer can reach 0.2 Ångstrom (0.02nm) resolution in d33 piston motion.
NanoMeter Measurement Platform
A Radiant Precision Test System combined with a Nanometer Measurement Platform allows accurate measurement of the piezoelectric (d33) coefficient on packaged parts. The cost-effective IVS-500 is mounted horizontally to be used with Radiant’s Simple Test Station, Bulk Ceramic Test Fixture and/or a Thermal Stage (-196C-650C). An auxiliary USB camera is included in the system to allow precise focus onto the target of interest.
Dual e31 Piezoelectric Cantiliver System
I
Radiant’s revolutionary approach to measuring both direct and converse e31 coefficients simultaneously using a single sample and test fixture. This technique reduces the need for multiple samples and fixtures, significantly improving efficiency and accuracy in piezoelectric characterization. The Dual e31 system simplifies the process by using two capacitors on a single cantilever to capture both coefficients in one test.
Dual e31 Measurement
- Apply voltage to the actuator capacitor to bend the cantilever while measuring the displacement.
- Converse e31 and surface strain
- Simultaneously capture the charge generated by the sense capacitor as it is bent by the actuator capacitor.
- Sense polarization
- Calculate the Direct e31 coefficient by dividing the surface strain into the sense polarization.
Radiant's D33 Bulk Ceramic Piezoelectric Test Bundles
AutoCal 230°C Piezoelectric Thermal Tester Chamber- The bundle includes a Piezoelectric Displacement Sensor, Heated Piezoelectric/Pyroelectric Measurement Test Fixture, and Advanced Piezoelectric Software. The Bulk Piezoelectric/Pyroelectric Test Bundle allows samples to internally be heated to 230C in a self-contained test fixture. The heating unit is built-in to the sample holder, so no additional temperature chamber is necessary. The bundle's simple user interface is controlled by Radiant's fully automated Vision Data Acquisition Software
Bulk Ceramic D33 Piezoelectric Test Bundle - The Bulk Piezoelectric Test Bundle is a cost effective option for researchers measuring piezoelectric displacements on the order of one micron or larger using Radiant testers. The high voltage displacement test fixture provides a safe operating environment for testing at high voltages and is rated to 10kV. The fiber optic sensor detects the amplitude of non-coherent light reflected from the sample surface to determine the distance from the sensor wand to the sample surface.
