Enhanced electrocaloric effect in relaxor ferroelectric polymers through hot press processing

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-06-09 DOI:10.1063/5.0270941

Linxiao Xu, Shengfei Tang, Chenyi Li, Yang Liu

引用次数: 0

Abstract

Electrocaloric relaxor ferroelectric polymers have been considered as dominant polymer materials for refrigeration applications. However, the magnitude of the electrocaloric effect remains relatively small, especially in the low electric field regime. Here, it is reported that using hot pressing at 40 MPa under a holding temperature of 100 °C and a holding time of 10 min as a postprocessing method, an improved electrocaloric temperature change of 4.7 K is achieved under a low electric field of 50 MV m−1, which exceeds pristine polymers by over 50%. The enhanced electrocaloric response is attributed to the stabilization of all-trans conformation caused by hot pressing, which facilitates the ease of electric field-induced disorder-to-order phase transition.

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热压加工增强弛豫铁电聚合物的热效应

电热弛豫铁电聚合物已被认为是制冷应用的主要聚合物材料。然而，电热效应的量级仍然相对较小，特别是在低电场状态下。本文报道，采用热压40 MPa，保温温度为100℃，保温时间为10 min的后处理方法，在50 MV m−1的低电场下实现了4.7 K的电热温度变化，比原始聚合物提高了50%以上。热压使全反式构象稳定，有利于电场诱导的无序到有序相变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.