Inner Mechanism of Enhanced Energy Storage Properties and Efficiency for CaTiO3 Modified 0.92NaNbO3-0.08Bi(Mg0.5Ti0.5)O3 Lead-Free Ceramics

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2023-05-05 DOI:10.1007/s13391-023-00434-3

Peng Nong, Yue Pan, Qinpeng Dong, Dafu Zeng, Mingzhao Xu, Xiang Wang, Jiaming Wang, Lian Deng, Xiuli Chen, Huanfu Zhou

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Abstract

NaNbO₃-based lead-free ceramics are gaining widespread interest in recent years due to their environmental friendliness and low density, which can meet the needs of future advanced pulse power electronics for low cost, miniaturization and integration. However, a reversible phase transition of FE-AFE at room temperature for pure NaNbO₃ ceramic will produce a large residual polarization, resulting in a low energy storage capacity. In this work, the ternary system (1-x)(0.92NaNbO₃-0.08Bi(M_g0.5Ti_0.5)O₃)-xCaTiO₃ was designed by introducing the linear material CaTiO₃ doped into (0.92NaNbO₃-0.08Bi(Mg_0.5Ti_0.5)O₃) ceramics to enhance the disorder of A/B sites in the system. The introduce of CaTiO₃ could optimize the relaxation characteristics of the ceramics, refine the grain size to improve the breakdown field strength(E_b), which enhance the energy storage properties to W_rec = 5.71 J/cm³ and η = 85.7% at 475 kV/cm. Additionally, the 0.8(0.92NN-0.08BMT)-0.2CT ceramic achieves both temperature (20–160 °C) and frequency (5 Hz -120 Hz) stability, while also obtains excellent charge/discharge performance(C_D = 607.22 A/cm²,P_D = 48.58 MW/cm³, t_0.9 = 28 ns), which indicates the great potential application in pulsed power capacities.

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CaTiO_ 3改性0.92NaNbO_3-0.08Bi（Mg_0.5Ti_0.5）O_

近年来，NaNbO3 基无铅陶瓷因其环保性和低密度而受到广泛关注，可满足未来先进脉冲功率电子器件对低成本、微型化和集成化的需求。然而，纯 NaNbO3 陶瓷在室温下的 FE-AFE 可逆相变会产生较大的残余极化，导致储能能力低下。在这项工作中，通过在（0.92NaNbO3-0.08Bi(Mg0.5Ti0.5)O3）陶瓷中引入线性材料 CaTiO3 掺杂，设计了 (1-x)(0.92NaNbO3-0.08Bi(Mg0.5Ti0.5)O3)-xCaTiO3 三元体系，以增强体系中 A/B 位点的无序性。CaTiO3 的引入可以优化陶瓷的弛豫特性，细化晶粒尺寸以提高击穿场强（Eb），从而提高储能特性，在 475 kV/cm 时，Wrec = 5.71 J/cm3，η = 85.7%。此外，0.8（0.92NN-0.08BMT）-0.2CT 陶瓷实现了温度（20-160 °C）和频率（5 Hz-120 Hz）稳定性，同时还获得了优异的充放电性能（CD = 607.22 A/cm2, PD = 48.58 MW/cm3, t0.9 = 28 ns），这表明它在脉冲功率容量方面具有巨大的应用潜力。图文摘要

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.