  Over the past decades, there has been significant interest in new cooling
technology based on the electrocaloric effect. The large electrocaloric effect
observed in polymeric and inorganic ferroelectric materials made possible
development of dielectric cooling devices of a new generation. We report a
significant impact of annealing on the electrocaloric effect observed in
12/65/35 PLZT bulk ceramics. The electrocaloric data were obtained by direct
measurements. Electrocaloric results confirm the existence of the significant
electrocaloric response in this relaxor ferroelectric PLZT composition
exceeding previously obtained electrocaloric values in perovskite relaxor
ferroelectrics such as PMN-PT and x/65/35 PLZT ceramics.
