Enhanced electrocaloric effect by configurational entropy change in (Ba,Sr,Ca,Bi,Li)TiO3 system

Xie, Lei; Zhao, Gaochao; Dong, Wei; Dong, Funing; Dou, Jinquan; Yue, Ruidong; Tong, Peng; Yang, Jie; Song, Wenhai; Yin, Li-Hua; Sun, Yuping

doi:10.1016/j.ceramint.2024.03.079

Ceramics International

2024

DOI: 10.1016/j.ceramint.2024.03.079

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Enhanced electrocaloric effect by configurational entropy change in (Ba,Sr,Ca,Bi,Li)TiO3 system

Lei Xie,

Gaochao Zhao,

Wei Dong

et al.

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2024

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Cited by 2 publications

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An in-depth comparison of dielectric, ferroelectric, piezoelectric, energy storage, electrocaloric, and piezocatalytic properties of Ba0.92Ca0.08Zr0.09Ti0.91O3 and Ba0.92Ca0.08Sn0.09Ti0.91O3 piezoceramics

Khandelwal,

Siroha,

Satapathy

et al. 2024

Ceramics International

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An in-depth comparison of dielectric, ferroelectric, piezoelectric, energy storage, electrocaloric, and piezocatalytic properties of Ba0.92Ca0.08Zr0.09Ti0.91O3 and Ba0.92Ca0.08Sn0.09Ti0.91O3 piezoceramics

Khandelwal,

Siroha,

Satapathy

et al. 2024

Ceramics International

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Large electrocaloric effect by disorder regulated structure in BaTiO3-based system

Xie,

Zhao,

Dou

et al. 2024

Applied Physics Letters

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We report the effects of B-site cationic size disorder (σ2) and configurational entropy (CE) on the crystal structure and electrocaloric (EC) effect of BaTi1−x−ySnxZryO3 (BTSZ) (0.01 ≤ x ≤ 0.06) ceramics. The samples were designed to show decreased σ2 and increased CE but the same B-site cation average radius and tolerance factor with increasing x. The tetragonal lattice distortion c/a and piezoelectricity showed a minimum and maximum, respectively, near x = 0.04. The ferroelectric Curie temperature decreased overall from ∼358 to ∼332 K with x increasing from 0.01 to 0.06. The EC effects measured by the direct method showed a maximum with an adiabatic temperature change of ∼0.80 K at 60 kV/cm near x = 0.04. The large EC effect in x = 0.04 is attributed to the small tetragonal distortion and low energy barrier for E-induced phase transformation due to the combined disorder effects of cationic size and configuration. Our results suggest a close correlation between the lattice distortion and EC effects and an effective route to improve the EC effects.

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Enhanced electrocaloric effect by configurational entropy change in (Ba,Sr,Ca,Bi,Li)TiO3 system

Cited by 2 publications

References 39 publications

An in-depth comparison of dielectric, ferroelectric, piezoelectric, energy storage, electrocaloric, and piezocatalytic properties of Ba0.92Ca0.08Zr0.09Ti0.91O3 and Ba0.92Ca0.08Sn0.09Ti0.91O3 piezoceramics

An in-depth comparison of dielectric, ferroelectric, piezoelectric, energy storage, electrocaloric, and piezocatalytic properties of Ba0.92Ca0.08Zr0.09Ti0.91O3 and Ba0.92Ca0.08Sn0.09Ti0.91O3 piezoceramics

Large electrocaloric effect by disorder regulated structure in BaTiO3-based system

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