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Phase–composition and temperature dependence of electrocaloric effect in lead–free Bi0.5Na0.5TiO3–BaTiO3–(Sr0.7Bi0.20.1)TiO3ceramics
Li, Feng1,2,3; Chen, Guorui4; Liu, Xing1; Zhai, Jiwei1; Shen, Bo1; Zeng, Huarong2; Li, Shandong4; Li, Peng1; Yang, Ke1; Yan, Haixue5
2017
发表期刊Journal of the European Ceramic Society
ISSN09552219
卷号37期号:15页码:4732-4740
摘要The (0.94–x)Bi0.5Na0.5TiO3–0.06BaTiO3–x(Sr0.7Bi0.20.1)TiO3(BNT–BT–xSBT, 0 ≤ x ≤ 0.24) solid solution ceramics were synthesized via a conventional solid–state reaction method and the correlation of phase structure, piezoelectric, ferroelectric properties and electrocaloric effect (ECE) was investigated in detail. The ECE in lead–free BNT–BT–xSBT ceramics was measured directly using a home–made adiabatic calorimeter with maximum adiabatic temperature change ΔT = 0.4 K with x = 0.08 under the electric field E = 6 kV/mm at room temperature. The position of maximum ECE was found in the vicinity of nonergodic and ergodic phase boundary, where the maximum change in entropy occurs as a result of the field–induced phase transformation between the ergodic and long–range ferroelectric phase. Besides, the mechanism for the shift of ECE peak is discussed in detail. Finally, the temperature dependence of ECE for BNT–BT–xSBT (x = 0, 0.04 and 0.08) was also investigated. This work may present a guideline for designing BNT–based ferroelectric relaxor ceramics for EC cooling technologies. © 2017 Elsevier Ltd
DOI10.1016/j.jeurceramsoc.2017.06.033
EI入藏号20172603846295
EI主题词Ferroelectric ceramics
EI分类号641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 804.2 Inorganic Compounds - 812.1 Ceramics - 933 Solid State Physics
引用统计
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25899
专题中国科学院上海硅酸盐研究所
作者单位1.Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai; 201804, China;
2.Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
3.University of Chinese Academy of Sciences, Beijing; 100049, China;
4.College of Physics, Qingdao University, 308 Ningxia Road, Qingdao; 266071, China;
5.School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London; E1 4NS, United Kingdom
推荐引用方式
GB/T 7714
Li, Feng,Chen, Guorui,Liu, Xing,等. Phase–composition and temperature dependence of electrocaloric effect in lead–free Bi0.5Na0.5TiO3–BaTiO3–(Sr0.7Bi0.20.1)TiO3ceramics[J]. Journal of the European Ceramic Society,2017,37(15):4732-4740.
APA Li, Feng.,Chen, Guorui.,Liu, Xing.,Zhai, Jiwei.,Shen, Bo.,...&Yan, Haixue.(2017).Phase–composition and temperature dependence of electrocaloric effect in lead–free Bi0.5Na0.5TiO3–BaTiO3–(Sr0.7Bi0.20.1)TiO3ceramics.Journal of the European Ceramic Society,37(15),4732-4740.
MLA Li, Feng,et al."Phase–composition and temperature dependence of electrocaloric effect in lead–free Bi0.5Na0.5TiO3–BaTiO3–(Sr0.7Bi0.20.1)TiO3ceramics".Journal of the European Ceramic Society 37.15(2017):4732-4740.
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