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
Source PublicationJournal of the European Ceramic Society
AbstractThe (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
EI Accession Number20172603846295
EI KeywordsFerroelectric ceramics
EI Classification Number641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 804.2 Inorganic Compounds - 812.1 Ceramics - 933 Solid State Physics
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Document Type期刊论文
Affiliation1.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
Recommended Citation
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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