Abstract
The pyroelectric properties of a hot-pressed PLZT (8/40/60) were investigated in some detail to evaluate its potential as a prospective pyroelectric infrared detector material. The results of measurements show that (8/40/60) has a relatively high dielectric constant, a high pyroelectric coefficient and favorable thermal and mechanical characteristics comparable with (8/65/35). The calculated figures of merit based on the measured properties were compared with other PLZTs of (8/65/35), (12/40/60) and (14/40/60) compositions and LiTaO 3 single crystal. The results indicate that (8/40/60) is a promising material for small area voltage mode infrared detectors. This material has permanent bias to its polarization, so that repoling is not necessary following a temperature excursion above the Curie temperature.
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