Novel NaNbO3-Sr0.7Bi0.2TiO3 lead-free dielectric ceramics with excellent energy storage properties

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F21%3APU142059" target="_blank" >RIV/00216305:26620/21:PU142059 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0272884220329461?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0272884220329461?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ceramint.2020.09.228" target="_blank" >10.1016/j.ceramint.2020.09.228</a>

Result language
angličtina
Original language name
Novel NaNbO3-Sr0.7Bi0.2TiO3 lead-free dielectric ceramics with excellent energy storage properties
Original language description
NaNbO3 (NN) is considered to be one of the most prospective lead-free antiferroelectric energy storage materials due to the merits of low cost, nontoxicity, and low density. Nevertheless, the electric field-induced ferroelectric phase remains dominant after the removal of the electric field, resulting in large residual polarization, which prevents NN ceramics from obtaining superior energy storage performance. In this work, the relaxor ferroelectric Sr0.7Bi0.2TiO3 (SBT) was chosen to partially replace the NN ceramics, and the introduction of the nanodomain of the relaxor ferroelectric hinders the generation of field-induced ferroelectric phases, allowing the material to combine the large polarization strength of the relaxor ferroelectric with the near-zero residual polarization of the antiferroelectric. Large recoverable energy storage density (4.5 J cm(-3)) and ultra-high energy storage efficiency (90.3%) were gained in NN-20SBT under an electric field of 288 kV cm(-1). Furthermore, superior temperature (25-120 degrees C) and frequency (1-500 Hz) stabilities were acquired. These performances demonstrate that NN20SBT ceramics are potential candidates as dielectric materials for high energy storage density pulsed power capacitors.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20504 - Ceramics

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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