Quantifying the electrocaloric effect in multilayer capacitors using the Clausius–Clapeyron method

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Thermal Sciences Pub Date : 2024-11-21 DOI:10.1016/j.ijthermalsci.2024.109520

Youri Nouchokgwe , Pierre Lheritier , Hugo Aramberri , Alvar Torello , Tomoyasu Usui , Sakyo Hirose , Veronika Kovacova , Emmanuel Defay

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Abstract

The electrocaloric effect arises from changes in entropy due to changes in electric field. This effect is particularly significant at the transition temperature of first-order transition materials such as lead scandium tantalate. In this study, we measured the transition isothermal entropy change of this material in the form of multilayer capacitors using the Clausius–Clapeyron method. The transition entropy was determined by analyzing the field dependence of the transition temperature and the transition jump in polarization. As a result, our lead scandium multilayer capacitors demonstrated a transition entropy change of 2.7 J kg⁻¹ K⁻¹. This value is consistent with previously reported values and is in line with the thermally driven entropy change of 2.4 J kg⁻¹ K⁻¹.

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利用克劳修斯-克拉皮隆法量化多层电容器中的电致冷效应

电致冷效应源于电场变化引起的熵的变化。这种效应在一阶过渡材料（如钽酸铅钪）的过渡温度下尤为显著。在这项研究中，我们采用克劳修斯-克拉皮隆法测量了这种多层电容器形式的材料的过渡等温熵变。过渡熵是通过分析过渡温度和极化过渡跃迁的磁场依赖性确定的。结果表明，我们的铅钪多层电容器的过渡熵变化为 2.7 J kg-1 K-1。这一数值与之前报道的数值一致，并与热驱动熵变 2.4 J kg-1 K-1 相吻合。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.