文献类型：期刊文献

英文题名：Electrocaloric response near room temperature in Zr- and Sn-doped BaTiO3 systems

作者：Hou, Ying[1,2,3];Yang, Lu[1,2];Qian, Xiaoshi[1,2];Zhang, Tian[1,2];Zhang, Q. M.[1,2]

机构：[1]Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA;[2]Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA;[3]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2016

卷号：374

期号：2074

外文期刊名：PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES

收录：;EI(收录号：20162902614005);WOS:【SCI-EXPANDED(收录号:WOS:000391135500015)】；

基金：Y.H. acknowledges that the work was financially supported by a scholarship from the China Scholar Council and by the National Natural Science Foundation of China (Contract No. 51303053) and L.Y. was financially supported by a scholarship from the China Scholar Council. Authors thank Nascent Devices LLC and the College of Engineering at Penn State for funding to cover the experimental costs.

语种：英文

外文关键词：electrocaloric; ferroelectric; Zr- and Sn-doped BaTio(3)

摘要：The electrocaloric effect (ECE) in (1 - x) BaZr0.18Ti0.82O3-(x)BaSn0.11Ti0.89O3 (BZT18-BST11, 0.1 <= x <= 0.5) ceramics is investigated near room temperature using a calorimetry method. The ceramics exhibit relaxor-like ferroelectric characteristics and by merging phases, a large electrocaloric (EC) response is observed in the system. The largest entropy change is 4.8 Jkg(-1) K-1 (along with a temperature change of 3.5 K), which is induced under an electric field of 10MVm(-1) for the 0.8 BaZr0.18Ti0.82O3-0.2 BaSn0.11Ti0.89O3 ceramics. This result reveals that the coexistence of multiple phases improves the ECE of the ceramics, which provides an effective route to achieve a large EC response using a small electric field. This article is part of the themed issue 'Taking the temperature of phase transitions in cool materials'.