Giant electrocaloric effect in BaZr0.2Ti0.8O3 thick film

Hui Jian Ye; Xiao Shi Qian; Dae Yong Jeong; Shujun Zhang; Yue Zhou; Wen Zhu Shao; Liang Zhen; Q. M. Zhang

doi:10.1063/1.4898599

Giant electrocaloric effect in BaZr_0.2Ti_0.8O₃ thick film

Hui Jian Ye, Xiao Shi Qian, Dae Yong Jeong, Shujun Zhang, Yue Zhou, Wen Zhu Shao, Liang Zhen, Q. M. Zhang

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

95 Scopus citations

Abstract

We report the giant electrocaloric effect (ECE) of BaZr_0.2Ti_0.8O₃ (BZT) thick film near room temperature. The BZT thick film was fabricated by the tape casting method with the thickness of 12.0 μm. Due to the near invariant critical point composition, relaxor behavior, and the stress generated between the film and the substrate, the thick film exhibits a large adiabatic temperature drop ΔT = -7°C under 19.5 MV/m electric field, large EC coefficient ΔT/ΔE = 0.50 × 10^-6 K·m·V^-1, ΔS/ΔE = 0.88 × 10^-6 J·m·kg^-1·K^-1·V^-1 over a wide temperature range near room temperature, where ΔS is the isothermal entropy change and ΔE is the applied field. These high EC properties and possibility of fabrication of the EC ceramics into multilayer ceramic capacitor configuration provide solution for the application of the EC material for practical cooling device applications.

Original language	English (US)
Article number	152908
Journal	Applied Physics Letters
Volume	105
Issue number	15
DOIs	https://doi.org/10.1063/1.4898599
State	Published - Oct 13 2014

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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title = "Giant electrocaloric effect in BaZr0.2Ti0.8O3 thick film",

abstract = "We report the giant electrocaloric effect (ECE) of BaZr0.2Ti0.8O3 (BZT) thick film near room temperature. The BZT thick film was fabricated by the tape casting method with the thickness of 12.0 μm. Due to the near invariant critical point composition, relaxor behavior, and the stress generated between the film and the substrate, the thick film exhibits a large adiabatic temperature drop ΔT = -7°C under 19.5 MV/m electric field, large EC coefficient ΔT/ΔE = 0.50 × 10-6 K·m·V-1, ΔS/ΔE = 0.88 × 10-6 J·m·kg-1·K-1·V-1 over a wide temperature range near room temperature, where ΔS is the isothermal entropy change and ΔE is the applied field. These high EC properties and possibility of fabrication of the EC ceramics into multilayer ceramic capacitor configuration provide solution for the application of the EC material for practical cooling device applications.",

author = "Ye, {Hui Jian} and Qian, {Xiao Shi} and Jeong, {Dae Yong} and Shujun Zhang and Yue Zhou and Shao, {Wen Zhu} and Liang Zhen and Zhang, {Q. M.}",

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doi = "10.1063/1.4898599",

language = "English (US)",

volume = "105",

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AU - Ye, Hui Jian

AU - Qian, Xiao Shi

AU - Jeong, Dae Yong

AU - Zhang, Shujun

AU - Zhou, Yue

AU - Shao, Wen Zhu

AU - Zhen, Liang

AU - Zhang, Q. M.

PY - 2014/10/13

Y1 - 2014/10/13

N2 - We report the giant electrocaloric effect (ECE) of BaZr0.2Ti0.8O3 (BZT) thick film near room temperature. The BZT thick film was fabricated by the tape casting method with the thickness of 12.0 μm. Due to the near invariant critical point composition, relaxor behavior, and the stress generated between the film and the substrate, the thick film exhibits a large adiabatic temperature drop ΔT = -7°C under 19.5 MV/m electric field, large EC coefficient ΔT/ΔE = 0.50 × 10-6 K·m·V-1, ΔS/ΔE = 0.88 × 10-6 J·m·kg-1·K-1·V-1 over a wide temperature range near room temperature, where ΔS is the isothermal entropy change and ΔE is the applied field. These high EC properties and possibility of fabrication of the EC ceramics into multilayer ceramic capacitor configuration provide solution for the application of the EC material for practical cooling device applications.

AB - We report the giant electrocaloric effect (ECE) of BaZr0.2Ti0.8O3 (BZT) thick film near room temperature. The BZT thick film was fabricated by the tape casting method with the thickness of 12.0 μm. Due to the near invariant critical point composition, relaxor behavior, and the stress generated between the film and the substrate, the thick film exhibits a large adiabatic temperature drop ΔT = -7°C under 19.5 MV/m electric field, large EC coefficient ΔT/ΔE = 0.50 × 10-6 K·m·V-1, ΔS/ΔE = 0.88 × 10-6 J·m·kg-1·K-1·V-1 over a wide temperature range near room temperature, where ΔS is the isothermal entropy change and ΔE is the applied field. These high EC properties and possibility of fabrication of the EC ceramics into multilayer ceramic capacitor configuration provide solution for the application of the EC material for practical cooling device applications.

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Giant electrocaloric effect in BaZr_0.2Ti_0.8O₃ thick film

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