Tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers

X. Sun; H. Huang; X. Ma; Y. Wen; Z. M. Dang

doi:10.4416/JCST2018-00002

Tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers

X. Sun, H. Huang^*, X. Ma, Y. Wen, Z. M. Dang

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

We investigated a tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers by using the phenomenological Landau-Devonshire thermodynamic theory. A tunable temperature range of entropy change was obtained from 265 ∼ 270 K for the specific composition of BaSrTiO₃ bilayers. Theoretical analysis shows that the external stress can tune the temperature range of electrocaloric effects from 220 K to 286 K, and the stress can tune the maximum temperature change 13 K per GPa. The thickness ratio of composition gradient films also can vary the adiabatic temperature change under constant stress. The present study therefore contributes to the understanding of stress effects of electrocaloric cooling and provides guidance for experiments to design high-efficiency cooling devices.

Original language	English
Pages (from-to)	201-208
Number of pages	8
Journal	Journal of Ceramic Science and Technology
Volume	9
Issue number	2
DOIs	https://doi.org/10.4416/JCST2018-00002
Publication status	Published - Jun 2018
Externally published	Yes

Keywords

Electrocaloric effect
Ferroelectric gradient bilayers
Thermodynamic calculation
Tunable temperature range

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10.4416/JCST2018-00002

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title = "Tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers",

abstract = "We investigated a tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers by using the phenomenological Landau-Devonshire thermodynamic theory. A tunable temperature range of entropy change was obtained from 265 ∼ 270 K for the specific composition of BaSrTiO3 bilayers. Theoretical analysis shows that the external stress can tune the temperature range of electrocaloric effects from 220 K to 286 K, and the stress can tune the maximum temperature change 13 K per GPa. The thickness ratio of composition gradient films also can vary the adiabatic temperature change under constant stress. The present study therefore contributes to the understanding of stress effects of electrocaloric cooling and provides guidance for experiments to design high-efficiency cooling devices.",

keywords = "Electrocaloric effect, Ferroelectric gradient bilayers, Thermodynamic calculation, Tunable temperature range",

author = "X. Sun and H. Huang and X. Ma and Y. Wen and Dang, {Z. M.}",

note = "Publisher Copyright: {\textcopyright} 2018 G{\"o}ller Verlag.",

year = "2018",

month = jun,

doi = "10.4416/JCST2018-00002",

language = "English",

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pages = "201--208",

journal = "Journal of Ceramic Science and Technology",

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TY - JOUR

T1 - Tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers

AU - Sun, X.

AU - Huang, H.

AU - Ma, X.

AU - Wen, Y.

AU - Dang, Z. M.

PY - 2018/6

Y1 - 2018/6

N2 - We investigated a tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers by using the phenomenological Landau-Devonshire thermodynamic theory. A tunable temperature range of entropy change was obtained from 265 ∼ 270 K for the specific composition of BaSrTiO3 bilayers. Theoretical analysis shows that the external stress can tune the temperature range of electrocaloric effects from 220 K to 286 K, and the stress can tune the maximum temperature change 13 K per GPa. The thickness ratio of composition gradient films also can vary the adiabatic temperature change under constant stress. The present study therefore contributes to the understanding of stress effects of electrocaloric cooling and provides guidance for experiments to design high-efficiency cooling devices.

AB - We investigated a tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers by using the phenomenological Landau-Devonshire thermodynamic theory. A tunable temperature range of entropy change was obtained from 265 ∼ 270 K for the specific composition of BaSrTiO3 bilayers. Theoretical analysis shows that the external stress can tune the temperature range of electrocaloric effects from 220 K to 286 K, and the stress can tune the maximum temperature change 13 K per GPa. The thickness ratio of composition gradient films also can vary the adiabatic temperature change under constant stress. The present study therefore contributes to the understanding of stress effects of electrocaloric cooling and provides guidance for experiments to design high-efficiency cooling devices.

KW - Electrocaloric effect

KW - Ferroelectric gradient bilayers

KW - Thermodynamic calculation

KW - Tunable temperature range

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U2 - 10.4416/JCST2018-00002

DO - 10.4416/JCST2018-00002

M3 - Article

AN - SCOPUS:85049902392

SN - 2190-9385

VL - 9

SP - 201

EP - 208

JO - Journal of Ceramic Science and Technology

JF - Journal of Ceramic Science and Technology

IS - 2

ER -

Tunable temperature range of stress-enhanced electrocaloric effects in composition gradient bilayers

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Keywords

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