Bismuth ferrite-based lead free ceramics and multilayers with high recoverable energy density

WANG, Dawei, FAN, Zhongming, ZHOU, Di, KHESRO, Amir, MURAKAMI, Shunsuke, FETEIRA, Antonio, ZHAO, Quanliang, TAN, Xiaoling and REANEY, Ian (2018). Bismuth ferrite-based lead free ceramics and multilayers with high recoverable energy density. Journal of Materials Chemistry A, 6 (9), 4133-4144.

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Lead-free ceramics with high recoverable energy density (Wrec) and energy storage efficiency (η) are attractive for advanced pulsed power capacitors to enable greater miniaturization and integration. In this work, dense bismuth ferrite (BF)-based, lead-free 0.75(Bi1-xNdx)FeO3-0.25BaTiO3 (BNxF-BT) ceramics and multilayers were fabricated. A transition from a mixed pseudocubic and R3c to a purely pseudocubic structure was observed as x increased with optimum properties obtained for mixed compositions. Highest energy densities, W ~ 4.1 J/cm3 and Wrec ~ 1.82 J/cm3 were achieved for BN15F-BT, due to the enhanced breakdown field strength (BDS ~ 180 kV/cm) and large maximum polarization (Pmax ~ 40 μC/cm2). Multilayers of this composition possessed both high Wrec of 6.74 J/cm3 and η of 77% and were stable up to 125 °C. Nd doped BF-based ceramics with enhanced BDS and large Wrec are therefore considered promising candidates for lead-free energy storage applications.

Item Type: Article
Departments - Does NOT include content added after October 2018: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
Identification Number:
Page Range: 4133-4144
Depositing User: Antonio Feteira
Date Deposited: 12 Feb 2018 10:02
Last Modified: 18 Mar 2021 06:38

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