Pyroelectric performance evaluation and measurement methods of PZT-4 and PZT-5 materials
Detailed investigations of the pyroelectric properties of PZT-4 and PZT-5 materials are rarely reported.Herein,PZT-4 and PZT-5 materials were prepared by solid state sintering method and characterized with SEM,XRD and dielectric temperature spectrum.The pyroelectric coefficient of the prepared materials was investigated by combining static and dynamic measurement methods.The influence of the wave amplitude and frequency of sinusoidal alternating temperature on the measurement results of the pyroelectric coefficient was investigated.In addition,the pyroelectric figure-of-merits of the prepared materials were also studied.The results show that the maximum value of the pyroelectric coefficient of PZT-4 and PZT-5 can be obtained at 2.8 V and 2.5 V respectively under 16 mHz,or at 24 mHz and 40 mHz respectively under 2.5 V.The detectivity figure-of-merits of the prepared materials are higher than those of PVDF.This work provides a quantitative reference for the potential application of PZT-4 and PZT-5 materials in pyroelectric energy harvesting and uncooled infrared focal plane devices.
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