磁性弹热制冷材料概述及特性分析

A Summary and Characteristic Analysis of Magnetic Elastocaloric Materials for Solid-state Cooling

近年来,弹热制冷材料受到了研究者们的广泛关注.磁结构相变中磁和结构自由度之间强烈的耦合作用为发现能够实现多场控制的新型弹热材料提供了催化剂.本文主要研究具有机械制冷应用前景的磁性形状记忆合金,对这些材料展现的区别于传统形状记忆合金的新奇特征进行了综述.从物理学和工程技术的角度出发,对如何提高弹热温变值,增加热效应可逆性,增强机械性能提出了普适性策略.此外,本文对应用于同类型制冷技术的压热效应也进行了讨论.

In the past decade,there has been an increased surge in the research on elastocaloric materials for solid-state refrigerators.The strong coupling between structure and magnetism inspires the discovery of new multi-field driven elastocaloric alloys.This work is devoted to magnetic shape memory alloys suitable for mechanical cooling applications.A general overview is given of some novel characteristics in magnetostructural transition materials different from those of conventional shape memory alloys.From the physical and engineering perspectives,the general strategies of maximizing elastocaloric temperature change,increasing performance reversibility and improving mechanical properties have been put forward.In addition,the barocaloric effect is also discussed,which is applied to the same type of refrigeration technology.