Abstract
Herein, 0.9(K0.49Na0.49Li0.02)(Nb0.8Ta0.2)O3–0.1CaZrO3 (KNLNT–0.1CZ) relaxor system in multilayer ceramic capacitor (MLCC) are designed to attain elevated electrocaloric effect (ECE). Based on direct measurement, a large ∆T of 2.45 K is achieved in KNLNT–0.1CZ MLCC, which is nearly 10 times higher than that of ceramic counterpart. The temperature span (Tspan) on a benchmark of ∆T above 1.5 K come up to 65 °C. Such excellent ECE benefits by synergistic effect of relaxor phase transition and high electric field. This study shed light a strategy on designing new ECE materials with large ∆T and wide Tspan for solid-state cooling.
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