Giant Negative Electrocaloric Effect in (Pb,La)(Zr,Sn,Ti)O3 Antiferroelectrics Near Room Temperature

Fangping Zhuo; Qiang Li; Jinghan Gao; Yongjie Ji; Qingfeng Yan; Yiling Zhang; Hong-Hui Wu; Xiao-Qing Xi; Xiangcheng Chu; Wenwu Cao

doi:10.1021/acsami.8b00744

Giant Negative Electrocaloric Effect in (Pb,La)(Zr,Sn,Ti)O₃ Antiferroelectrics Near Room Temperature

ACS Appl Mater Interfaces. 2018 Apr 11;10(14):11747-11755. doi: 10.1021/acsami.8b00744. Epub 2018 Apr 2.

Authors

Fangping Zhuo, Qiang Li, Jinghan Gao, Yongjie Ji, Qingfeng Yan, Yiling Zhang, Hong-Hui Wu¹, Xiao-Qing Xi, Xiangcheng Chu, Wenwu Cao^{2

3}

Affiliations

¹ Department of Mechanical and Aerospace Engineering , Hong Kong University of Science and Technology , Clear Water Bay, Kowloon 999077 , Hong Kong , China.
² Condensed Matter Science and Technology Institute , Harbin Institute of Technology , Harbin 150080 , Heilongjiang , China.
³ Materials Research Institute , The Pennsylvania State University , University Park, State College , Pennsylvania 16802 , United States.

PMID: 29565114
DOI: 10.1021/acsami.8b00744

Abstract

(Pb_0.97La_0.02)(Zr _xSn_{0.94- x}Ti_0.06)O₃ (PLZST) antiferroelectric ceramics with x = 0.75-0.90 have been fabricated and found to be a novel electrocaloric material system with a giant negative electrocaloric effect (Δ T = -11.5 K) and a large electrocaloric strength (|Δ T/Δ E| = 0.105 K cm kV^-1) near room temperature. Additionally, the PLZST antiferroelectric ceramic also exhibits a large positive electrocaloric effect around the Curie temperature. The giant negative effect and the coexistence of both positive and negative electrocaloric effects in one material indicate a promising possibility to develop mid- to large-scale solid-state cooling devices with high efficiency.

Keywords: PLZST; antiferroelectric; electrocaloric effect; electrocaloric strength; solid-state cooling.