Large Electrocaloric Effect in Lead-Free (Ba0.85Ca0.15)(Zr0.1Ti0.9)O₃ Ceramics Prepared via Citrate Route

Jing Shi; Rongfeng Zhu; Xing Liu; Bijun Fang; Ningyi Yuan; Jianning Ding; Haosu Luo

doi:10.3390/ma10091093

Large Electrocaloric Effect in Lead-Free (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃ Ceramics Prepared via Citrate Route

Materials (Basel). 2017 Sep 18;10(9):1093. doi: 10.3390/ma10091093.

Authors

Jing Shi^{1

2}, Rongfeng Zhu³, Xing Liu⁴, Bijun Fang⁵, Ningyi Yuan⁶, Jianning Ding^{7

8}, Haosu Luo⁹

Affiliations

¹ School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China. shijing@ccit.js.cn.
² Institute of Electronic and Electrical, Changzhou College of Information Technology, Changzhou 213164, China. shijing@ccit.js.cn.
³ School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China. izhurongfeng@outlook.com.
⁴ School of Materials Science and Engineering, Tongji University, Shanghai 201804, China. lxferro@163.com.
⁵ School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China. fangbj@cczu.edu.cn.
⁶ School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China. nyyuan@cczu.edu.cn.
⁷ School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China. dingjn@cczu.edu.cn.
⁸ School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China. dingjn@cczu.edu.cn.
⁹ Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences, Shanghai 201800, China. hsluo@mail.sic.ac.cn.

Abstract

The 1 wt % Li-doped (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃ (BCZT-Li) ceramics prepared by the citrate method exhibit improved phase purity, densification and electrical properties, which provide prospective possibility to develop high-performance electrocaloric materials. The electrocaloric effect was evaluated by phenomenological method, and the BCZT-Li ceramics present large electrocaloric temperature change ∆T, especially large electrocaloric responsibility ξ = ∆T_max/∆E_max, which can be comparable to the largest values reported in the lead-free piezoelectric ceramics. The excellent electrocaloric effect is considered as correlating with the coexistence of polymorphic ferroelectric phases, which are detected by the Raman spectroscopy. The large ξ value accompanied by decreased Curie temperature (around 73 °C) of the BCZT-Li ceramics prepared by the citrate method presents potential applications as the next-generation solid-state cooling devices.

Keywords: Raman spectroscopy; citrate method; electrocaloric effect; lead-free BCZT piezoceramics.