Large electrocaloric efficiency over a broad temperature span in lead-free BaTiO3-based ceramics near room temperature

Tangyuan Li; Xinyu Liu; Sheng Shi; Yihao Yin; Hongfa Li; Qiongyan Wang; Yunlu Zhang; Jihong Bian; S. S. Rajput; Changbai Long; Biaolin Peng; Yang Bai; Yunzhi Wang; Xiaojie Lou

doi:10.1063/1.5001366

Large electrocaloric efficiency over a broad temperature span in lead-free BaTiO₃-based ceramics near room temperature

Tangyuan Li
, Xinyu Liu
, Sheng Shi
, Yihao Yin
, Hongfa Li
, Qiongyan Wang
, Yunlu Zhang
, Jihong Bian
, S. S. Rajput
, Changbai Long
, Biaolin Peng
, Yang Bai
, Yunzhi Wang
, Xiaojie Lou

Frontier Institute of Science and Technology

Xi'an Jiaotong University
Air Force Engineering University Xian
Guangxi University
University of Science and Technology Beijing
Ohio State University

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

We report a large electrocaloric efficiency of 0.029 K cm kV^-1 at 303 K and in a wide operating temperature range of 293 K to 313 K in a lead-free Ba_0.9Sr_0.1(Ti_0.9Zr_0.1)_0.95Sn_0.05O₃ ceramic by using direct electrocaloric effect (ECE) measurements. Sn⁴⁺ doping in Ba_0.9Sr_0.1Ti_0.9Zr_0.1O₃ not only tunes the rhombohedral-to-paraelectric phase transition temperature to room temperature but also slightly widens the phase transition region, by slightly strengthening the diffuse character and maintaining its good ferroelectricity. Also, polar nanoregions embedded in the matrix facilitate polarization rotation because of a flat energy landscape associated with the relaxor-to-ferroelectric phase transition, inducing enhanced entropy changes and consequently excellent ECE performance.

Original language	English
Article number	202902
Journal	Applied Physics Letters
Volume	111
Issue number	20
DOIs	https://doi.org/10.1063/1.5001366
State	Published - 13 Nov 2017

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@article{c8a3fce460fb46c9881fa8be166a01fa,

title = "Large electrocaloric efficiency over a broad temperature span in lead-free BaTiO3-based ceramics near room temperature",

abstract = "We report a large electrocaloric efficiency of 0.029 K cm kV-1 at 303 K and in a wide operating temperature range of 293 K to 313 K in a lead-free Ba0.9Sr0.1(Ti0.9Zr0.1)0.95Sn0.05O3 ceramic by using direct electrocaloric effect (ECE) measurements. Sn4+ doping in Ba0.9Sr0.1Ti0.9Zr0.1O3 not only tunes the rhombohedral-to-paraelectric phase transition temperature to room temperature but also slightly widens the phase transition region, by slightly strengthening the diffuse character and maintaining its good ferroelectricity. Also, polar nanoregions embedded in the matrix facilitate polarization rotation because of a flat energy landscape associated with the relaxor-to-ferroelectric phase transition, inducing enhanced entropy changes and consequently excellent ECE performance.",

author = "Tangyuan Li and Xinyu Liu and Sheng Shi and Yihao Yin and Hongfa Li and Qiongyan Wang and Yunlu Zhang and Jihong Bian and Rajput, \{S. S.\} and Changbai Long and Biaolin Peng and Yang Bai and Yunzhi Wang and Xiaojie Lou",

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day = "13",

doi = "10.1063/1.5001366",

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T1 - Large electrocaloric efficiency over a broad temperature span in lead-free BaTiO3-based ceramics near room temperature

AU - Li, Tangyuan

AU - Liu, Xinyu

AU - Shi, Sheng

AU - Yin, Yihao

AU - Li, Hongfa

AU - Wang, Qiongyan

AU - Zhang, Yunlu

AU - Bian, Jihong

AU - Rajput, S. S.

AU - Long, Changbai

AU - Peng, Biaolin

AU - Bai, Yang

AU - Wang, Yunzhi

AU - Lou, Xiaojie

PY - 2017/11/13

Y1 - 2017/11/13

N2 - We report a large electrocaloric efficiency of 0.029 K cm kV-1 at 303 K and in a wide operating temperature range of 293 K to 313 K in a lead-free Ba0.9Sr0.1(Ti0.9Zr0.1)0.95Sn0.05O3 ceramic by using direct electrocaloric effect (ECE) measurements. Sn4+ doping in Ba0.9Sr0.1Ti0.9Zr0.1O3 not only tunes the rhombohedral-to-paraelectric phase transition temperature to room temperature but also slightly widens the phase transition region, by slightly strengthening the diffuse character and maintaining its good ferroelectricity. Also, polar nanoregions embedded in the matrix facilitate polarization rotation because of a flat energy landscape associated with the relaxor-to-ferroelectric phase transition, inducing enhanced entropy changes and consequently excellent ECE performance.

AB - We report a large electrocaloric efficiency of 0.029 K cm kV-1 at 303 K and in a wide operating temperature range of 293 K to 313 K in a lead-free Ba0.9Sr0.1(Ti0.9Zr0.1)0.95Sn0.05O3 ceramic by using direct electrocaloric effect (ECE) measurements. Sn4+ doping in Ba0.9Sr0.1Ti0.9Zr0.1O3 not only tunes the rhombohedral-to-paraelectric phase transition temperature to room temperature but also slightly widens the phase transition region, by slightly strengthening the diffuse character and maintaining its good ferroelectricity. Also, polar nanoregions embedded in the matrix facilitate polarization rotation because of a flat energy landscape associated with the relaxor-to-ferroelectric phase transition, inducing enhanced entropy changes and consequently excellent ECE performance.

UR - https://www.scopus.com/pages/publications/85034253710

U2 - 10.1063/1.5001366

DO - 10.1063/1.5001366

M3 - 文章

AN - SCOPUS:85034253710

SN - 0003-6951

VL - 111

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

M1 - 202902

ER -

Large electrocaloric efficiency over a broad temperature span in lead-free BaTiO₃-based ceramics near room temperature

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