Enhanced energy-storage performances and thermal stability in BNT–LST-based ceramics by tuning domain configuration and bandgap

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-02-12 DOI:10.1007/s12598-024-03051-7

Fang-Fang Zeng, Qian-Si Zhang, Shi-Dong Zhang, Qi Sun, Hui-Tao Guo, Qing-Quan Xiao, Quan Xie, Li Zhang, Gui-Fen Fan, Yun-Peng Qu, Jia Liu, Qi-Bin Liu, Yun-Lei Zhou

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引用次数: 0

Abstract

Low energy-storage density and inferior thermal stability are a long-term obstacle to the advancement of pulse power devices. Herein, these concerns are addressed by improving bandgap and fabricating polar nanoregions, and the superior high efficiency of ~ 86.7%, excellent thermal stability of ~ 2% (31–160 °C) and energy density of ~ 6.8 J·cm^–3 are achieved in Bi_0.5Na_0.5TiO₃–La_0.1Sr_0.8TiO_3-_δ–NaNbO₃ ceramics. The high breakdown strength (460 kV·cm^–1) is ascribed to the broadened bandgap and refined grain. Slim ferroelectric loops originate from the construction of polar nanoregions (PNRs) in a pseudocubic matrix, and transmission electron microscope and piezoelectric force microscope measurements reveal the occurrence of PNRs. The phase-field stimulation and UV–Vis spectrophotometer measurement reveal that the increased grain boundary density and bandgap are beneficial for promoting breakdown strength. The strategy provides an efficient path to prepare Bi_0.5Na_0.5TiO₃La_0.1Sr_0.8TiO_3-_δ-based ceramics with superior efficiency, high energy density and outstanding thermal stability.

Graphical abstract

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通过调整畴结构和带隙，增强了bnt - lst基陶瓷的储能性能和热稳定性

储能密度低、热稳定性差是制约脉冲功率器件发展的长期障碍。本文通过改进带隙和制备极性纳米区来解决这些问题，在Bi0.5Na0.5TiO3-La0.1Sr0.8TiO3 -δ-NaNbO3陶瓷中获得了~ 86.7%的高效率、~ 2%（31-160°C）的优异热稳定性和~ 6.8 J·cm-3的能量密度。高击穿强度（460 kV·cm-1）是由于带隙加宽和晶粒细化所致。超薄铁电环起源于伪矩阵中极性纳米区（PNRs）的构建，透射电子显微镜和压电力显微镜的测量揭示了PNRs的存在。相场刺激和紫外可见分光光度计测量结果表明，晶界密度和带隙的增加有利于提高击穿强度。该策略为制备Bi0.5Na0.5TiO3La0.1Sr0.8TiO3-δ基陶瓷提供了一条高效、高能量密度和优异热稳定性的有效途径。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.