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Giant Negative Electrocaloric Effect in (Pb,La)(Zr,Sn,Ti)O3 Antiferroelectrics Near Room TemperatureZhuo, Fangping; Li, Qiang; Gao, Jinghan; Ji, Yongjie; Yan, Qingfeng; Zhang, Yiling; Wu, Hong-Hui; Xi, Xiao-Qing; Chu, Xiangcheng; Cao, Wenwu
ACS applied materials & interfaces, 04/2018, Letnik: 10, Številka: 14Journal Article
(Pb0.97La0.02)(Zr x Sn0.94–x Ti0.06)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 (ΔT = −11.5 K) and a large electrocaloric strength (|ΔT/ΔE| = 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.
