ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 68, (4) 505 - 515 (2024)


ACHIEVING SUPERIOR ENERGY STORAGE PERFORMANCE IN BARIUM TITANATE CERAMICS VIA A RARE EARTH CO-DOPING STRATEGY
 
Alkathy Mahmoud. S. 1, Kassim H. A. 2, Gatasheh Mansour K. 3,Goud J Pundareekam 4, Eiras Jose A. 1
 
1 Department of Physics, Federal University of Sao Carlos, Sao Carlos, SP 13565-905, Brazil.
2 Department of Physics, College of Science, P.O. BOX 2455, King Saud University, Riyadh 11451, Saudi Arabia.
3 Department of Biochemistry College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
4 Department of Physics, Koneru Lakshmaiah Education Foundation, Bowrampet, Hyderabad, 500043, Telangana, India.

Keywords: Co-doping, Dielectric constant, Ferroelectric, Breakdown strength, Energy storage density
 

This study describes the fabrication of polycrystalline ceramics Ba1-x(La1/3, Nd1/3)xTiO₃ by a solid-state reaction technique. The room temperature X-ray diffraction analysis using Rietveld refinement confirmed the formation of a polycrystalline compound with a tetragonal crystal structure consisting of a single phase. Doping BaTiO₃ with La3+ and Nd3+ ions enhanced the relative permittivity at room temperature. The co-doped samples possess a much higher dielectric constant in the wide frequency range, an essential characteristic for producing ceramic capacitors. The P-E hysteresis loop of the investigated samples was performed at room temperature. The results show that the remnant polarisation decreased from 9.05 to 1.95 μC/cm² while the breakdown strength increased from 50 kV/cm to 167 kV/cm when the co-opants rose from 0 to 8%. Accordingly, the energy storage density increased from 0.265 to 1.182 J/cm³, and the efficiency also increased from 30% to 77%. The BLNT8% sample is also very stable throughout a wide temperature range, making it a promising option for future energy storage applications.


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doi: 10.13168/cs.2024.0049
 
 
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