TY - JOUR

T1 - Giant electrocaloric effect and high-field electrostrictive properties in Ba (Ti1-xSnx)O-3 ceramics

AU - Ma, Xiyu

AU - Shi, Wenjing

AU - Yang, Yule

AU - Alikin, D. O.

AU - Shur, V. Ya.

AU - Gao, Jinghui

AU - Wei, Xiaoyong

AU - Liu, Gang

AU - Du, Hongliang

AU - Jin, Li

N1 - This work was finically supported by the National Natural Science Foundation of China (Grant Nos. 52261135548 and 52172127 ), the Key Research and Development Program of Shaanxi (Program No. 2022KWZ-22 ), and the National Key Research and Development Program of China (Grant Nos. 2021YFE0115000 and 2021YFB3800602 ), the Youth Innovation Team of Shaanxi Universities , the Scientific Research Program Funded by Shaanxi Provincial Education Department , China (Grant No. 22JP073 ) and the Fundamental Research Funds of Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices ( AFMD-KFJJ-21203 ). The research was made possible by Russian Science Foundation (Project No. 23-42-00116 ). The equipment of the Ural Center for Shared Use “Modern nanotechnology” Ural Federal University (Reg. No. 2968) which is supported by the Ministry of Science and Higher Education RF (Project No. 075-15-2021-677 ) was used. The SEM work was done at International Center for Dielectric Research (ICDR), Xi'an Jiaotong University, Xi'an, China

PY - 2023

Y1 - 2023

N2 - One of the emerging solid-state refrigeration technologies to replace classic compression refrigeration is electrocaloric refrigeration, which has the advantages of high energy conversion efficiency, easy miniaturization, eco-friendliness, and low cost. In this paper, Ba(Ti1-xSnx)O-3 (BTSn) ceramics with x = 0.02-0.08 were prepared by a solid-state reaction route. The structural, dielectric, ferroelectric, electrocaloric as well as electrostrictive characteristics were thoroughly examined. Our results show that the dielectric peaks correlated to the maximal permittivity move towards to low temperature direction when the Sn4+ concentration gradually increases, and a phase diagram of BTSn based on the dielectric characteristics is given. More importantly, in the x = 0.04 ceramic sample synthesized by the viscous polymer process, a giant adiabatic temperature change (AT) of 6.36 K with a temperature range of 25 degrees C at 200 kV/cm is achieved. Typically flare shape electrostrain curves accompanying with small hysteresis are observed in all studied compositions. The average electrostrictive coefficient Q(33) varies within 0.0257-0.0306 m(4)/C-2 at a temperature region from 30 to 160 degrees C, indicating temperature-insensitive and composition-insensitive characteristics. This research shows that a significant electrocaloric effect can be ach-ieved in BTSn ceramics through high electric field, and would provide a strategy for boosting the electrocaloric effect in other systems.

AB - One of the emerging solid-state refrigeration technologies to replace classic compression refrigeration is electrocaloric refrigeration, which has the advantages of high energy conversion efficiency, easy miniaturization, eco-friendliness, and low cost. In this paper, Ba(Ti1-xSnx)O-3 (BTSn) ceramics with x = 0.02-0.08 were prepared by a solid-state reaction route. The structural, dielectric, ferroelectric, electrocaloric as well as electrostrictive characteristics were thoroughly examined. Our results show that the dielectric peaks correlated to the maximal permittivity move towards to low temperature direction when the Sn4+ concentration gradually increases, and a phase diagram of BTSn based on the dielectric characteristics is given. More importantly, in the x = 0.04 ceramic sample synthesized by the viscous polymer process, a giant adiabatic temperature change (AT) of 6.36 K with a temperature range of 25 degrees C at 200 kV/cm is achieved. Typically flare shape electrostrain curves accompanying with small hysteresis are observed in all studied compositions. The average electrostrictive coefficient Q(33) varies within 0.0257-0.0306 m(4)/C-2 at a temperature region from 30 to 160 degrees C, indicating temperature-insensitive and composition-insensitive characteristics. This research shows that a significant electrocaloric effect can be ach-ieved in BTSn ceramics through high electric field, and would provide a strategy for boosting the electrocaloric effect in other systems.

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000989287700001

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85149717213

U2 - 10.1016/j.ceramint.2023.02.225

DO - 10.1016/j.ceramint.2023.02.225

M3 - Article

VL - 49

SP - 18517

EP - 18524

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 11

ER -