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- Title
[Bi<sup>3+</sup>/Zr<sup>4+</sup>] induced ferroelectric to relaxor phase transition of BaTiO<sub>3</sub> ceramic for significant enhancement of energy storage properties and dielectric breakdown strength.
- Authors
Mahmoud, Abd El-razek; Kamal, Amira A.; Ezzeldien, Mohammed; Babeer, Afaf M.
- Abstract
The low breakdown strength and recoverable energy storage density of pure BaTiO3 (BT) dielectric ceramics limits the increase in energy-storage density. This study presents an innovative strategy to improve the energy storage properties of BT by the addition of Bi2O3 and ZrO2. The effect of Bi, Mg and Zr ions (abbreviate BMZ) on the structural, dielectric and energy storage properties of BaTiO3 ceramic by synthesize (Ba0.85Bi0.06Mg0.06)(Ti0.95Zr0.05)O3 (abbreviation BT-BMZ) lead-free ceramics have been investigated. Ferroelectric to relaxor phase transition has been achieved at BT-based which attributed to the different ionic radius and valances of ions into both of A and B-sites of BT lattice. The permittivity diffusive phase transition (γ) was observed increased from 1.24 to 1.89 by addition of BMZ to BT-lattice. The BT-BMZ sample shown significant enhancement of recoverable energy density (Wrec = 8.1 J/cm3), energy storage efficiency (ƞ = 86%) and dielectric breakdown strength Eb = 700kV/cm. The enhancement of energy storage performance is due to the hybridization between Bi3+ 6Pand O2− 2P instead of Ba2+ 4F and O2− 2P orbitals. On the other hand, the substitution of iso-valence (Ba2+) by trivalent (Bi3+) lead to create barium vacancies into the A-sites of BT lattice subsequently reducing the remnant polarization (Pr). The thermal stability into (Wrec) and efficiency (η) were enhanced by introducing BMZ to BT-lattice in a wide range of temperature (25–175 °C) due to present the relaxor phase in a wide range of temperature. The BT-BMZ ceramics are promising candidate for advanced pulsed power technology and energy storage applications.
- Subjects
PHASE transitions; DIELECTRIC breakdown; ENERGY storage; DIELECTRIC strength; DIELECTRIC properties; BARIUM; PULSED power systems
- Publication
Applied Physics A: Materials Science & Processing, 2024, Vol 130, Issue 6, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-024-07417-7