High energy storage density and discharging efficiency in La3+/Nb5+-co-substituted (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics

In this work, [(Bi1-xLax)0.5Na0.5]0.94Ba0.06(Ti1-5y/4Nby)O3 ceramics have been developed by the dual-substitution of La3+ for Bi3+ and Nb5+ for Ti4+ and prepared by an ordinary sintering technique. All ceramics can be well-sintered at 1200 °C. The addition of La3+ and Nb5+ reduces the grain size and...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2019-08, Vol.39 (10), p.3051-3056
Main Authors: Yang, Yang, Wang, Hua, Bi, Linnan, Zheng, Qiaoji, Fan, Guifen, Jie, Wenjing, Lin, Dunmin
Format: Article
Language:English
Subjects:
Bi0.5Na0.5TiO3
Dielectric breakdown strength
Energy storage
Grain size
Polarization hysteresis loop
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Summary:In this work, [(Bi1-xLax)0.5Na0.5]0.94Ba0.06(Ti1-5y/4Nby)O3 ceramics have been developed by the dual-substitution of La3+ for Bi3+ and Nb5+ for Ti4+ and prepared by an ordinary sintering technique. All ceramics can be well-sintered at 1200 °C. The addition of La3+ and Nb5+ reduces the grain size and improve the dielectric breakdown strength of the ceramics; moreover, after the introduction of La3+ and Nb5+, the remanent polarization of the ceramics is significantly reduced, while the maximum polarization remains the same large value as that of the ceramic without the doping of La3+ and Nb5+. As a result, high energy storage density and discharge efficiency are achieved at x/y = 0.07/0.02, giving the large storage density of 1.83 J/cm3 and high discharging efficiency of 70%. The present work presents a feasible strategy to develop energy storage materials based on perovskite ferroelectrics by the partial substitutions in the A and B sites.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2019.04.031