Enhancement of the electrocaloric effect in the 0.4BCZT-0.6BTSn ceramic synthesized by sol-gel route

The lead-free ferroelectric 0.4Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 –0.6BaTi 0.89 Sn 0.11 O 3 (0.4BCZT–0.6BTSn) ceramics were successfully prepared by the sol–gel process. Raman spectroscopy was used to examine the structural properties of the 0.4BCZT-0.6BTSn sample. The findings indicate that the sa...

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Bibliographic Details
Published in:Materials research express 2023-12, Vol.10 (12), p.125509
Main Authors: Khardazi, S, Zaitouni, H, Neqali, A, Mezzane, D, Amjoud, M, Abkhar, Z, Lyubchyk, S, Rožič, B, Kutnjak, Z, Lukyanchuk, I
Format: Article
Language:English
Subjects:
Ceramics
Condensed Matter
Crystallization
Electric fields
electrocaloric effect
Ferroelectric materials
Ferroelectricity
Lead free
lead-free ferroelectric
perovskite
Perovskite structure
Perovskites
Phase transitions
Physics
Raman spectroscopy
Room temperature
sol-gel
Sol-gel processes
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Summary:The lead-free ferroelectric 0.4Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 –0.6BaTi 0.89 Sn 0.11 O 3 (0.4BCZT–0.6BTSn) ceramics were successfully prepared by the sol–gel process. Raman spectroscopy was used to examine the structural properties of the 0.4BCZT-0.6BTSn sample. The findings indicate that the sample was well crystallized into a single perovskite structure. The phase transitions of the studied sample have been investigated using the DSC technique. The electrocaloric effect (ECE) properties were indirectly determined using the Maxwell approach. Under a relatively low applied electric field of 30 kV cm −1 , the results show enhanced electrocaloric temperature change and entropy change of ΔT = 1.32 K and ΔS = 1.41 J/kg.K, respectively. Besides, the electrocaloric responsivity ( ξ max = 0.45 K·mm/kV) obtained is among the highest reported values in pb-free ferroelectrics near room temperature. These findings demonstrate that the lead-free 0.4BCZT–0.6BTSn ceramic is a promising candidate for solid-state cooling applications.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ad1773