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Improved electrocaloric effect of Ba0.7Sr0.3TiO3 ceramics doped with B and Mn

  • Original Paper: Sol-gel and hybrid materials for dielectric, electronic, magnetic and ferroelectric applications
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Abstract

Ba0.7Sr0.3TiO3 added with 1 mol% B3+ and x mol% Mn2+ (BSTBM) ceramics were synthesized using citrate combustion technique. An enhanced electrocaloric effect has been reported in BSTBM ceramic. The addition of B3+ and Mn2+ ions lowers the sintering temperature of BSTBM ceramics to 1200 °C. The ceramic sample with x = 0.5 exhibits homogeneous grain size, low dielectric loss and large polarization. More importantly, the ceramic sample with x = 0.5 shows the excellent electrocaloric properties (adiabatic temperature change, ΔT = 0.86 K, and electrocaloric responsivity, ΔT/ΔE = 0.43 K m MV−1) under electric field of 20 kV/cm and room temperature. Moreover, a high ΔT of 3.08 K and ΔT/ΔE of 0.31 K m MV−1 are obtained under electric field of 100 kV/cm near room temperature for this composition.

Graphical Abstract

Ba0.7Sr0.3TiO3 added with 1 mol% B3+ and x mol% Mn2+ (BSTBM, x = 0.3, 0.5, 1.0 and 1.5) ceramics were synthesized using citrate combustion technique. Different content of Mn2+ ions were introduced into BST ceramics, and the electrical properties were studied. Moreover, the electric field dependence of the electrocaloric behaviors were studied systematically. Our work demonstrates that B3+ + Mn2+ is more promising improve the sintering condition of BST ceramics and serves as an effective and environmental-friendly additive to induce higher room-temperature ECE performances under low fields.

Highlights

  • The addition of B3+ and Mn2+ lowers the sintering temperature of BSTBM ceramic.

  • Improved microstructure and enhanced electrocaloric properties are realized.

  • Large adiabatic temperature change ΔT = 3.08 K is obtained at 100 kV/cm.

  • ΔT = 0.86 K and ΔT/ΔE = 0.43 K m MV−1 are realized at 37.5 °C and 20 kV/cm.

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Authors and Affiliations

  1. School of Materials and Energy, Southwest University, Chongqing, 400715, China

    Zunping Xu, Jinchuan Wang & Yi Chen

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  1. Zunping Xu
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  2. Jinchuan Wang
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  3. Yi Chen
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Correspondence to Zunping Xu.

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Xu, Z., Wang, J. & Chen, Y. Improved electrocaloric effect of Ba0.7Sr0.3TiO3 ceramics doped with B and Mn. J Sol-Gel Sci Technol 107, 483–489 (2023). https://doi.org/10.1007/s10971-023-06135-5

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  • DOI: https://doi.org/10.1007/s10971-023-06135-5

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