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Research Article | Open Access

Achieving high dielectric energy-storage properties through a phase coexistence design and viscous polymer process in BNT-based ceramics

Yule Yanga,, Juanjuan Wanga( ), Ruiyi Jingb, Wenjing Shib, Leiyang Zhangb, Chao Lic, Xinyu Zengd, Fukang Chend, Gang Liud, Xiaolian Chaoe, Yan Yand( ), Li Jinb( )
School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, China
Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
Instrument Analysis Center, Xi'an Jiaotong University, Xi'an, 710049, China
School of Materials and Energy, Southwest University, Chongqing, 400715, China
Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China

Peer review under responsibility of The Chinese Ceramic Society.

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Graphical Abstract

Abstract

In the last few decades, dielectric capacitors have gotten a lot of attention because they can store more power and charge and discharge very quickly. But it has a low energy-storage density (Wrec), efficiency (η), and temperature stability. By adding Pb(Mg1/3Nb2/3)O3 (PMN) and (Bi0·1Sr0.85)TiO3 (BST) to a nonstoichiometric (Bi0·51Na0.5)TiO3 (BNT) matrix, the goal is to change the phase transition properties and make the material more relaxor ferroelectric (RFE) by lowering the remnant polarization Pr and keeping the maximum polarization Pmax. A viscous polymer process (VPP) is used to improve the electric breakdown strength, which is also a key part of being able to store energy. By working together, ceramics with the formula 0.79[0.85BNT-0.15PMN]-0.21BST (BP-0.21BST) are made. The phase structure has been changed from a rhombohedral phase to a rhombohedral-tetragonal coexisted phase. This is beneficial for RFE properties and gives a Wrec of 6.45 J/cm3 and a η of 90% at 400 kV/cm. Also, the energy-storage property is very temperature stable between 30 and 150 ℃. These results show that process optimization and composition design can be used to improve the energy storage properties, and that the dielectric ceramic materials made can be used in high-powder pulse dielectric capacitors.

Keywords

Relaxor ferroelectricBNTEnergy-storageCharge-dischargeViscous polymer process

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Journal of Materiomics
Volume 9 Issue 6,
November 2023
Pages 1004-1014
DOI: 10.1016/j.jmat.2023.03.006
Cite this article:
Yang Y, Wang J, Jing R, et al. Achieving high dielectric energy-storage properties through a phase coexistence design and viscous polymer process in BNT-based ceramics. Journal of Materiomics, 2023, 9(6): 1004-1014. https://doi.org/10.1016/j.jmat.2023.03.006

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Received: 08 February 2023
Revised: 10 March 2023
Accepted: 15 March 2023
Published: 14 April 2023
© 2023 The Authors.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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