Enhancement of electrocaloric strength by grain configuration design

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-02-06 DOI:10.1016/j.cej.2025.160353

Cuiping Xu, Xiaofan Sun, Peiqi Ji, Min Zhao, Tingfeng Li, Peng Chen, Hong-Ling Cai, X.S. Wu

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引用次数: 0

Abstract

Electrocaloric refrigeration technology presents a promising approach for cooling systems by cyclic processes of applying and removing an electric field to ferroelectric materials. However, dielectric breakdown remains a significant challenge in achieving a substantial temperature change. Chemical modification strategies aimed at enhancing breakdown strength by reducing grain size, but it also suppresses ferroelectric polarization, detrimental to electrocaloric performance. In this study, we addressed this issue by successfully achieving high breakdown strength and significant polarization in 0.3Pb(Mg_1/2W_1/2)O₃-0.3Pb(Ni_1/3Nb_2/3)O₃-0.4PbTiO₃ (PMW-PNN-PT) material by filling large grain gaps with small grains through glass powder doping. Specifically, at an optimized proportion of 0.7 wt% of the glass powder, the maximum electric field in the electrocaloric effect measurements via the direct method increased from 20 kV/cm to 50 kV/cm, and the corresponding electrocaloric temperature change rose from 0.21 K to 0.6 K. This approach represents a novel method to simultaneously enhance breakdown strength and polarization, resulting in a remarkable improvement in the electrocaloric performance.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.