Dielectric properties and electrocaloric effect of high-entropy (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic
Publication type: Journal Article
Publication date: 2019-11-25
scimago Q1
wos Q2
SJR: 0.896
CiteScore: 6.1
Impact factor: 3.6
ISSN: 00036951, 10773118
Physics and Astronomy (miscellaneous)
Abstract
Single-phase homogeneous (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 powder with high configurational entropy was synthesized by using a solid-state method. Calculations of thermodynamic parameters and related experiments indicate that both entropy and enthalpy drive the formation of a stable system. To further research the material's performance, we sintered the powder into a ceramic, which exhibited relaxation behavior because of the disorder of the microscopic composition. In addition, an applied electric field of 145 kV/cm produces a discharge energy density of 1.02 J/cm3. Meanwhile, the adiabatic temperature is 0.63 K at 60 kV/cm. These properties suggest that the electrocaloric effect of the (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic is attractive for applications such as solid-state refrigeration and energy storage. High-entropy perovskite oxides are also highly tolerant to ions, and their properties can be tailored by tuning their composition, making them attractive for a broad range of applications.
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Pu Y. et al. Dielectric properties and electrocaloric effect of high-entropy (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic // Applied Physics Letters. 2019. Vol. 115. No. 22. p. 223901.
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Pu Y., Zhang Q., Li R., Chen M., Du X., Zhou S. Dielectric properties and electrocaloric effect of high-entropy (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic // Applied Physics Letters. 2019. Vol. 115. No. 22. p. 223901.
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TY - JOUR
DO - 10.1063/1.5126652
UR - https://doi.org/10.1063/1.5126652
TI - Dielectric properties and electrocaloric effect of high-entropy (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic
T2 - Applied Physics Letters
AU - Pu, Yongping
AU - Zhang, Qianwen
AU - Li, Run
AU - Chen, Min
AU - Du, Xinyi
AU - Zhou, Shiyu
PY - 2019
DA - 2019/11/25
PB - AIP Publishing
SP - 223901
IS - 22
VL - 115
SN - 0003-6951
SN - 1077-3118
ER -
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@article{2019_Pu,
author = {Yongping Pu and Qianwen Zhang and Run Li and Min Chen and Xinyi Du and Shiyu Zhou},
title = {Dielectric properties and electrocaloric effect of high-entropy (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic},
journal = {Applied Physics Letters},
year = {2019},
volume = {115},
publisher = {AIP Publishing},
month = {nov},
url = {https://doi.org/10.1063/1.5126652},
number = {22},
pages = {223901},
doi = {10.1063/1.5126652}
}
Cite this
MLA
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Pu, Yongping, et al. “Dielectric properties and electrocaloric effect of high-entropy (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic.” Applied Physics Letters, vol. 115, no. 22, Nov. 2019, p. 223901. https://doi.org/10.1063/1.5126652.