Dielectric, ferroelectric, and energy storage properties of BNBTA-xSLZT lead-free ceramics

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of The European Ceramic Society Pub Date : 2025-06-01 Epub Date: 2025-01-16 DOI:10.1016/j.jeurceramsoc.2025.117219

Han-li Lian , Meng Shi , Sha Lv , Li-na Liu , Xiao-ming Chen

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Abstract

The lead-free ceramics (1-x)[0.97(0.94Bi_0.47Na_0.47Ba_0.06TiO₃-0.06BiAlO₃)-0.03AgNbO₃]-xSr_0.7La_0.2Zr_0.15Ti_0.85O₃ (denoted as BNBTA-xSLZT, x = 0, 0.3) with dense microstructures were prepared via a solid-state sintering method. Effect of addition of Sr_0.7La_0.2Zr_0.15Ti_0.85O₃ on microstructure, dielectric, ferroelectric, and energy storage properties of the ceramics was investigated thoroughly. Compared to the ceramic with x = 0, the ceramic BNBTA-0.3SLZT demonstrates small grains with average grain size of 0.57 μm and high breakdown strength of 345 kV/cm. BNBTA-0.3SLZT also exhibits excellent dielectric temperature stability with temperature coefficient of capacitance TCC ≤ 15 % between −8 °C and 256 °C. Remarkably, a recoverable energy density of 5.60 J/cm³ and an efficiency of 86.6 % were attained for BNBTA-0.3SLZT coupled with outstanding cycle stability and frequency stability, which can be used as one candidate for capacitor energy storage materials.

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BNBTA-xSLZT无铅陶瓷的介电、铁电和储能性能

采用固相烧结法制备了结构致密的无铅陶瓷（1-x）[0.97(0.94Bi0.47Na0.47Ba0.06TiO3-0.06BiAlO3)-0.03AgNbO3]-xSr0.7La0.2Zr0.15Ti0.85O3（记为BNBTA-xSLZT， x = 0,0.3）。研究了Sr0.7La0.2Zr0.15Ti0.85O3对陶瓷微观结构、介电性能、铁电性能和储能性能的影响。与x = 0的陶瓷相比，BNBTA-0.3SLZT的晶粒较小，平均晶粒尺寸为0.57 μm，击穿强度高达345 kV/cm。BNBTA-0.3SLZT还具有优异的介电温度稳定性，电容温度系数TCC≤ 15 %，介电温度系数为- 8°C ~ 256°C。值得注意的是，BNBTA-0.3SLZT的可回收能量密度为5.60 J/cm³ ，效率为86.6% %，并且具有良好的循环稳定性和频率稳定性，可以作为电容器储能材料的候选材料之一。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.