(also known as polarization and strain measurement)

This system measures the electrical and mechanical displacement of dielectric materials induced by an applied AC field. The following properties can be extracted:

  • D-E hysteresis loop parameters, polarization density, energy storage and loss
  • Electromechanical coupling: piezoelectricity, electrostriction, etc.
Measurement system
Current System

Electrical And Mechanical Displacement Measurement System

  • Apply AC field to sample
  • Measure sample charge
  • Measure mechanical displacement using a  linear variable differential transformer (LVDT)

EDS figure
Schematic of the measurement system [1]
EDS Figure
D-E hysteresis loop and polorization states at different regions [2]
EDS Figure
Unipolar strain hysteresis loop of poled PZT bulk [3]

Figure references:
[1] S. Ahmed et al., Smart Mater. Struct. Vol 23, 2014
[2] An American national standard IEEE standard definitions of terms associated with ferroelectric and related materials, IEEE Ultrasonics Ferroelectrics, and Frequency Control, Vol 50, 2003
[3] W. Zhu et al., IWATMD, 2019

  • Temperature: -100 °C - 150 °C
  • Voltage: ±10V (without amplifier)
  • ± 10kV (with amplifier)

D-E hysteresis loop:
Frequency: 0.001 - 100Hz
Charge: ~10pC to 100mC

S-E hysteresis loop:
Frequency: 0.01 -1Hz
Displacements: > 0.1 µm

Relevant keyword tags
MCL - Materials Characterization Lab
Dielectric, Piezoelectric, Ferroelectric