Large electrocaloric effect with ultrawide temperature span in Na1/2Bi1/2TiO3-based lead-free ceramics

被引：8

作者：

Wei, Qiumei ^{[1
,2
]}

Fulanovic, Lovro ^{[2
]}

Lalitha, Kodumudi Venkataraman ^{[2
]}

Zheng, Mupeng ^{[1
]}

Hou, Yudong ^{[1
]}

Zhu, Mankang ^{[1
]}

Liu, Linjing ^{[3
]}

Chang, Yunfei ^{[3
]}

Xue, Rui ^{[4
]}

机构：

[1] Beijing Univ Technol, Fac Mat & Mfg, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China

[2] Tech Univ Darmstadt, Inst Mat Sci, Darmstadt, Germany

[3] Harbin Inst Technol, Funct Mat & Acousto Opt Instruments Inst, Sch Instrumentat Sci & Engn, Harbin, Peoples R China

[4] Beijing Bldg Mat Testing Acad Co Ltd, Beijing, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2022年 / 105卷 / 05期

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

dielectric; electrocaloric effect; lead-free ferroelectrics; Na0; 5Bi0; 5TiO(3); relaxor behavior; FIELD-INDUCED STRAIN; ROOM-TEMPERATURE; TRANSITION;

D O I：

10.1111/jace.18291

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Innovative cooling technologies are recognized by many industries as a crucial part of their system design. A large electrocaloric effect (ECE) and extended working temperature are the key issues hindering the realization of electrocaloric refrigeration technology. In this work, large ECE (Delta T = 0.8-0.9 degrees C @ 4 kV/mm) with an ultrawide temperature span from 30 to 120 degrees C is noted for lead-free (Na1/2Bi1/2)(0.80)Sr-0.20(Zn1/3Nb2/3)(x)Ti1-xO3 ceramics. The excellent ECE performance can be ascribed to the evolution of polar nanoregions. Our work suggests that this material is promising for applications in solid-state refrigeration systems with a broad range of operating temperatures.

引用

页码：3312 / 3321

页数：10

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