掺Nd3+ (Bi0.40K0.2Na0.2Sr0.2)TiO3高熵陶瓷的低场储能性能增强

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-10-01 DOI:10.1111/jace.20156

Jiawei Lin, Tianyu Liu, Dongdong Meng, Qiang He, Wenhui Ye, Jinxu Ma, Kepi Chen

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引用次数: 0

摘要

由于对紧凑型电子器件的需求日益增长，无铅介电陶瓷的研究得到了加强，这种陶瓷在低电场条件下具有优越的可回收能量存储密度和效率。在本研究中，我们报道了采用固相反应技术合成掺Nd3+ (Bi0.4K0.2Na0.2Sr0.2)TiO3钙钛矿陶瓷。合成的陶瓷采用四方晶体结构。随着Nd3+离子浓度的增加，最大介电常数εm和对应的温度Tm均降低。Nd3+离子的掺入扰乱了长程铁电序，导致最大极化（Pm）和剩余极化（Pr）减小。当掺量为12 mol%的Nd3+时，陶瓷的性能达到最佳，在140 kV/cm的低电场下，陶瓷的可回收储能密度达到1.50 J/cm3，储能效率达到94.6%。这项研究不仅突出了在低电场应用中有前途的介电材料候选材料，而且还介绍了一种提高储能性能的创新方法。

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Enhanced low-field energy storage performance in Nd3+-doped (Bi0.40K0.2Na0.2Sr0.2)TiO3 high-entropy ceramics

The burgeoning requirement for compact electronic devices has intensified research into lead-free dielectric ceramics that offer superior recoverable energy storage density and efficiency at low electric fields. In this study, we report the synthesis of Nd³⁺-doped (Bi_0.4K_0.2Na_0.2Sr_0.2)TiO₃ perovskite ceramics via the solid-state reaction technique. The synthesized ceramics adopted a tetragonal crystal structure. As the concentration of Nd³⁺ ions increased, both the maximum dielectric constant (ε_m) and its corresponding temperature (T_m) decrease. The incorporation of Nd³⁺ ions perturbed the long-range ferroelectric order, leading to diminished maximum polarization (P_m) and remanent polarization (P_r). The ceramics achieved optimal properties with 12 mol% Nd³⁺ doping, showcasing a significant recoverable energy storage density of 1.50 J/cm³ at a low electric field of 140 kV/cm, along with an exceptional storage efficiency of 94.6%. This research not only highlights a promising candidate for dielectric materials in low electric field applications but also introduces an innovative approach to enhance energy storage performance.

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.