Coexistence of negative and positive electrocaloric effect in Sr and Nb co-doped Pb(Zr,Ti)O₃ ferroelectric ceramics

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• 作者：Caiyun Chen^a ; ^b ; Ruihong Liang^a ; ^{liangruihong@mail.sic.ac.cn} ; Zhen Liu^a ; Shiguang Yan^a ; Xin Nie^a ; ^b ; Zhiyong Zhou^a ; Xianlin Dong^a ; ^{xldong@mail.sic.ac.cn}
• 关键词：Ceramics ; Ferroelectric ; Positive electrocaloric effect ; Negative electrocaloric effect
• 刊名：Materials Letters
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：189
• 期：Complete
• 页码：303-306
• 全文大小：1384 K
• 卷排序：189

文摘

Sr and Nb co-doped Pb(Zr,Ti)O3 ferroelectric ceramics were synthesized by a solid-state reaction method. Rare phenomenon of coexistence of negative and positive electrocaloric effect was found in Sr and Nb co-doped Pb(Zr,Ti)O3 ferroelectric ceramics. High electrocaloric coefficient of −0.25 K mm kV−1 and 0.43 K mm kV−1 were obtained. Reason for the coexistence of negative and positive electrocaloric effect was discussed.