Study on structure and electrical properties of BNBT-La2/3ZrO3 ceramic

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2024-11-25 DOI:10.1016/j.jpcs.2024.112483

Jinhong He , Yunxin Wei , Qin Feng , Jiejie Qin , Yuan Tian , Yanpei Tang , Zhenyong Cen , Changlai Yuan , Nengneng Luo

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引用次数: 0

Abstract

BNT-based energy storage dielectric material is a new type of multifunctional material with environmental friendliness, high energy storage density, and excellent temperature stability. It is a research hotspot where different components are introduced into BNT-based ceramics to obtain ceramic materials with high energy storage density. In this study, 0.94Bi_0.5Na_0.5TiO₃-0.06BaTiO₃ (BNBT) was selected as the substrate and doped with La_2/3ZrO₃ (LZ). Through the modification of La³⁺/Zr⁴⁺ at A/B sites, wider optical bandgap and finer grains with exceptionally large electrical breakdown strength and relatively strong relaxation behaviors in the appropriate range were obtained. Ultimately, an ultra-high energy storage density of 6.48 J/cm³ was attained at 480 kV/cm with a La_2/3ZrO₃ concentration of 0.07 mol%. In addition, the BNBT-LZ ceramics exhibited a good frequency-stabilized dynamic range (W_rec = 3.29 ± 6.7 % J/cm³, 10–200 Hz) and temperature stability (W_rec = 3.63 ± 9.9 % J/cm³, 20–160 °C), together with excellent charge-discharge performance(t_0.9 = 3.36 μs). All these characteristics demonstrate that the modification of BNT-based ceramics by La³⁺/Zr⁴⁺ has a significant effect on the energy storage density. The results show that the BNBT-LZ system can be used as a promising dielectric material for high energy storage density capacitors.

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BNBT-La2/3ZrO3 陶瓷的结构和电气性能研究

BNT 基储能介电材料是一种新型多功能材料，具有环境友好、储能密度高、温度稳定性好等特点。在 BNT 基陶瓷中引入不同成分以获得高储能密度的陶瓷材料，是目前的研究热点。本研究选择 0.94Bi0.5Na0.5TiO3-0.06BaTiO3 (BNBT) 作为基底，并掺杂了 La2/3ZrO3 (LZ)。通过在 A/B 位点对 La3+/Zr4+ 的修饰，获得了更宽的光带隙和更细的晶粒，并在适当的范围内具有超大的电击穿强度和相对较强的弛豫行为。最终，在 La2/3ZrO3 浓度为 0.07 摩尔%、电压为 480 千伏/厘米的条件下，实现了 6.48 J/cm3 的超高能量存储密度。此外，BNBT-LZ 陶瓷还具有良好的频率稳定动态范围（Wrec = 3.29 ± 6.7 % J/cm³，10-200 Hz）和温度稳定性（Wrec = 3.63 ± 9.9 % J/cm³，20-160 °C），以及出色的充放电性能（t0.9 = 3.36 μs）。所有这些特性表明，La3+/Zr4+ 对 BNT 基陶瓷的改性对储能密度有显著影响。结果表明，BNBT-LZ 系统可作为一种很有前途的电介质材料用于高能量存储密度电容器。

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

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.