Inspection of Remanent Polarization in the Ferroelectric Ceramic PZT 95/5 Through Pyroelectric Effect

Abstract

Shock‐induced depoling of the ferroelectric (FE) ceramic PZT 95/5 is utilized in a number of pulsed power devices. Nondestructive testing of remanent polarization of PZT 95/5 is developed by pyroelectric effect in this paper. Approximately linear relation between the change of polarization during low‐ to high‐temperature rhombohedral FE phase and the remanent polarization was found through pyroelectricity of a single piece of PZT 95/5 ceramics. The change of polarization of a prototype for shock‐driven pulsed power during the FEHT↔FELT phase transformation was also investigated through directly measuring the pyroelectric current. Results indicate that pyroelectric effect caused by the reversible FEHT–FELT phase transition could be used as a non‐destructive inspection for the remanent polarization of a prototype about shock‐driven pulsed power supply.

Graphene-lead zirconate titanate optothermal field effect transistors

“…7 It is known that PZT is a pyroelectric material whose polarization can change when temperature is varied. 8 As a result, the bound charge density on the PZT surface can change with temperature, thus generating a temperaturechange induced current in an external circuit. [9][10][11] Combining the pyroelectricity and the high dielectric constant of PZT, it is possible to create a high-performance FET that can be gated with non-electric means.…”

Nondestructively measuring the remanent polarization of PZT 95/5 ceramics at room temperature

“…Therefore, this linear relation between P r and p indicates a nondestructive method to evaluate P r of one poled PZT 95/5 ferroelectric ceramic: If the pyroelectric efficient p during 25°C~20°C of one poled PZT95/5 ceramic is measured, the remanent polarization P r will be calculated through Equation (4), even though the ceramic is large or capsulated. This method is quite different from Zhang's report, 13 where pyroelectric effect caused by high-temperature to low-temperature rhombohedral phase transition (FE HT -FE LT ) was used as nondestructive inspection for the remanent polarization.…”

Maximum self‐generated electric field induced by pyroelectricity of PZT 95/5

“…The charge released by lead zirconate titanate PbZr 0.95 Ti 0.05 O 3 (PZT 95/5) is approximately 3 μC/cm 2 , and the temperature of FE LT -FE HT transformation is about 40ºC. 1,4 Because the phase transformation temperature is close to room temperature (RT) and the relative high current will produce, this kind of nonlinear pyroelectric effect induced by phase transformation can be used as thermoelectric application nearby RT. 5 FE LT -FE HT transformation is reversibility and far away from Curie temperature, the depolarization effect can be ignored.…”

“…In most research, pyroelectric effect was studied in short circuit or low electric field. 4,[6][7] But in thermoelectric application, high electric field may be introduced when high impedance load is used. 8 So the maximum electric field induced by FE HT -FE LT transformation needs research.…”