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Article Dans Une Revue Journal of Materiomics Année : 2022

Novel lead-free BCZT-based ceramic with thermally-stable recovered energy density and increased energy storage efficiency

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Matjaž Spreitzer
Zdravko Kutnjak
  • Fonction : Auteur
  • PersonId : 1008943
Brigita Rožič
  • Fonction : Auteur
  • PersonId : 1011343

Résumé

The eco-responsible lead-free piezoelectric ceramics have been intensively searched for more than a decade, however, the final goal to replace toxic ceramics like lead zirconate titanate (PZT) with lead-free compounds, having comparable or even better performance has not yet been reached. In this road, the lead-free ceramics Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT), possessing excellent dielectric, ferroelectric, and piezoelectric properties are regarded as serious candidates for the PZT replacement. Besides, nanostructuring BCZT is of paramount importance to enhance these functionalities even more. Here, BCZT multipodes are designed by template-growth hydrothermal synthesis using hydrogen zirconate titanate nanowires. We demonstrate that the fabricated BCZT multipodes exhibit high dielectric permittivity of 5300 with a temperature stability coefficient of ±5.9% between 20 and 140 °C. A significant recovered energy density of 315.0 mJ/cm3 with high thermal stability and high energy storage efficiency of 87.4%, and enhanced large-signal piezoelectric coefficient (310 pm/V) are found. Compared to the traditional BCZT ceramics reported in the literature, relying on high-temperature processing, our sample exhibits boosted energy storage parameters at a much lower temperature. These outcomes may offer a new strategy to tailor eco-responsible relaxor ferroelectrics toward superior energy storage performance for ceramic capacitor applications.
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Dates et versions

hal-03716479 , version 1 (07-07-2022)

Identifiants

Citer

Zouhair Hanani, Soukaina Merselmiz, M’barek Amjoud, Daoud Mezzane, Mohammed Lahcini, et al.. Novel lead-free BCZT-based ceramic with thermally-stable recovered energy density and increased energy storage efficiency. Journal of Materiomics, 2022, 8 (4), pp.873-881. ⟨10.1016/j.jmat.2021.12.011⟩. ⟨hal-03716479⟩
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