Publication Date:
2019
Description:
〈p〉Publication date: 1 January 2020〈/p〉
〈p〉〈b〉Source:〈/b〉 Scripta Materialia, Volume 174〈/p〉
〈p〉Author(s): Yang Yang, Zhijian Zhou, Xiaoqin Ke, Yu Wang, Xiaopo Su, Jianting Li, Yang Bai, Xiaobing Ren〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉The electrocaloric effect (ECE) of intrinsic-acceptor-doped ferroelectric system (1-〈em〉x〈/em〉)Ba(Ti〈sub〉0.9〈/sub〉Ce〈sub〉0.1〈/sub〉)O〈sub〉3〈/sub〉-〈em〉x〈/em〉(Ba〈sub〉0.7〈/sub〉Ca〈sub〉0.3〈/sub〉)TiO〈sub〉3〈/sub〉 (〈em〉x〈/em〉 = 0.3,0.5) has been studied by indirect and direct approaches. It was found that the indirect approach based on Maxwell equation is not appropriate for measuring the ECE of this acceptor-doped system. More importantly, a relatively large electrocaloric response is obtained at temperatures far below T〈sub〉C〈/sub〉 (maximum difference ~75 °C), which can reach 75%~90% of the maximum electrocaloric effect near T〈sub〉C〈/sub〉. The unique characteristics of this acceptor-doped system have been explained by the existence of orientable defect dipoles. Our work could stimulate the design of temperature-stable electrocaloric effect through acceptor-doping.〈/p〉〈/div〉
〈/div〉
〈div xml:lang="en"〉
〈h5〉Graphical abstract〈/h5〉
〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S1359646219305068-ga1.jpg" width="301" alt="Unlabelled Image" title="Unlabelled Image"〉〈/figure〉〈/p〉〈/div〉
〈/div〉
Print ISSN:
1359-6462
Electronic ISSN:
1872-8456
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
