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
Highlights
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The addition of B3+ and Mn2+ lowers the sintering temperature of BSTBM ceramic.
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Improved microstructure and enhanced electrocaloric properties are realized.
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Large adiabatic temperature change ΔT = 3.08 K is obtained at 100 kV/cm.
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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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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