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.

中文翻译：

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通过多层结构增强弛豫铌酸钾钠无铅陶瓷的电热效应

摘要 在此，多层陶瓷电容器 (MLCC) 中的 0.9(K0.49Na0.49Li0.02)(Nb0.8Ta0.2)O3–0.1CaZrO3 (KNLNT–0.1CZ) 弛豫系统旨在获得高电热效应 (ECE)。基于直接测量，KNLNT-0.1CZ MLCC 实现了 2.45 K 的大 ΔT，比陶瓷对应物高出近 10 倍。高于 1.5 K 的 ∆T 基准的温度跨度 (Tspan) 高达 65 °C。这种优异的 ECE 得益于弛豫相变和高电场的协同效应。这项研究阐明了设计具有大 ∆T 和宽 Tspan 的新型 ECE 材料用于固态冷却的策略。