Abstract
Lead-free 0.5BZT-0.5BCT ferroelectric ceramic was fabricated through the conventional solid-state reaction method. The electrocaloric effect (ECE) of 0.5BZT-0.5BCT was systematically investigated by both direct and indirect methods over a wide temperature range and electric field range. The maximum direct ECE ΔTEC = 0.464 K occurs at 100 °C under the electric field of 6 kV/mm, while the obtained maximum indirect ECE ∆TECID is 0.26 K when the electric filed is 2 kV/mm at 70 °C. ECE of 0.5BZT-0.5BCT ceramic exhibits a fast response speed (2–3 s), good cycle stability, and a wide working temperature range (80–140 °C) with ΔTEC ≥ 0.2 K, which indicates the promising candidate for applications in cooling technologies.
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