Broad temperature span and large electrocaloric effect in lead-free ceramics via multi-strategy synergistic optimization

被引：0
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作者：
Chen, Kui [1 ]
Zhao, Peng [2 ]
Chen, Jingjing [1 ]
Yang, Chengtao [1 ]
Tang, Bin [1 ]
机构：
[1] National Engineering Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, Univer
[2] College of Physics and Optoelectronics, Taiyuan University of Technology, Shanxi, Taiyuan,030024, China
来源：
Chemical Engineering Journal | 2024年 / 502卷
基金：
中国国家自然科学基金;
关键词：
The rapid advancement of electronic technology has increased power consumption in integrated circuits; presenting significant challenges for efficient cooling. BaTiO3 (BT)-based ceramics offer promising electrocaloric (EC) cooling; providing a compact; efficient alternative to bulky; environmentally harmful vapor compression refrigeration; though temperature span (Tspan) and phase transitions limit their current practicality. This study explores a novel (0.5-x)Ba0.72Sr0.28TiO3-0.5BaTi0.8Sn0.2O3-xBa0.72Ca0.28TiO3 [(0.5-x)BST-BTS-xBCT] ceramic system; leveraging phase boundary engineering to achieve continuous and broad phase transitions. By optimizing grain size and enhancing the breakdown electric field (Eb) through a density adjustment strategy; the 0.2BCT ceramics demonstrated excellent EC performance at 38 °C; with a ΔT of 2.71 K and a Tspan of 49.1 °C. These findings establish (0.5-x)BST-BTS-xBCT ceramics as a promising lead-free material for EC applications with significant potential for improving microelectronic cooling solutions. © 2024;
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