Type-I pseudo-first-order phase transition induced electrocaloric effect in lead-free Bi0.5Na0.5TiO3-0.06BaTiO3 ceramics

被引：86

作者：

Li, Feng ^{[1
,2
,3
]}

Chen, Guorui ^{[4
]}

Liu, Xing ^{[1
]}

Zhai, Jiwei ^{[1
]}

Shen, Bo ^{[1
]}

Li, Shandong ^{[4
]}

Li, Peng ^{[1
]}

Yang, Ke ^{[1
]}

Zeng, Huarong

Yan, Haixue ^{[5
]}

机构：

[1] Tongji Univ, Sch Mat Sci & Engn, Funct Mat Res Lab, 4800 Caoan Rd, Shanghai 201804, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Qingdao Univ, Coll Phys, 308 Ningxia Rd, Qingdao 266071, Peoples R China

[5] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 18期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

SOLID-STATE REFRIGERATION; ROOM-TEMPERATURE; PEROVSKITE FERROELECTRICS; RELAXOR FERROELECTRICS; THIN-FILM; SYSTEM; FIELD;

D O I：

10.1063/1.4983029

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this study, the electrocaloric effect (ECE) of Bi0.5Na0.5TiO3-0.06BaTiO(3) (BNT-0.06BT) ceramic has been directly measured using a home-made adiabatic calorimeter. The maximum adiabatic temperature change (Delta T) approaches 0.86K under an electric field of 5 kV/mm at 110 degrees C, which provides experimental evidence for optimizing the ECE near the type-I pseudo-first-order phase transition (PFOPT). Most importantly, a considerable Delta T value can be maintained over a wide temperature range well above the temperature of the PFOPT under a high electric field. In addition, Delta T is closely related to the structural transition and electric field strength. This work provides a guideline to investigate the high ECE in BNT-based ferroelectric ceramics for applications in cooling technologies.

引用

页数：5

共 41 条

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