Characteristics and dielectric properties of (Pb0.97−xLa0.02Bax)(Zr0.72Sn0.22Ti0.06)O3 ceramics

(Pb0.97−xLa0.02Bax)(Zr0.72Sn0.22Ti0.06)O3 (PLBZST) ceramics with x in the range of 0.09, 0.11, 0.13, 0.15 were fabricated by conventional solid-state reaction process, and their crystal structure, dielectric and electrocaloric effect were systemically investigated. The results showed that the ceramics with different Ba contents had a perovskite structure. Besides, it was found the ceramics transform gradually from antiferroelectric phase to paraelectric phase and the Curie temperature decreased with the increase of Ba content, when x = 0.15, the Curie temperature of the ceramics decreased to ∼30 °C near room temperature. The dielectric constant increased to about 12000 with increasing Ba contents. The change of temperature increased from 0.10 K to 0.25 K sharply at 2.2 kV/mm.