离子共掺杂诱导局部反铁电相共存，具有高能量存储性能的无铅（Na1-1.5xBixLa0.5x）（Nb1-xMgx）O3陶瓷

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-04-15 DOI:10.1016/j.jeurceramsoc.2025.117460

Mengfan Song , Tianran Zhang , Siyu Zhang , Siyuan Li , Ruirui Kang , Fang Kang , Lixue Zhang , Jiping Wang

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引用次数: 0

摘要

反铁电材料在电场作用下具有可逆的反铁电-铁电（AFE-FE）相变，因此在脉冲功率应用中引起了相当大的兴趣。然而，纯NaNbO3在室温电场作用下表现出铁电相特性，导致储能性能较低。通过离子共掺杂诱导局部反铁电相共存，制备了无铅（Na1-1.5xBixLa0.5x）（Nb1-xMgx）O3陶瓷。P-R相变温度低于室温，有利于极性纳米区的形成，当x = 0.06时，P-R相变温度达到有利的ΔP值（52 μC·cm−2）。因此，当x = 0.06时，样品在350 kV·cm−1下具有较高的储能密度（8.24 J·cm−3）、储能效率（93.7 %）和储能潜力（23.54 J·cm−2·MV−1），同时具有良好的频率（1 - 1000 Hz）和温度（25-150°C）稳定性。这项工作为在相同电场范围下的其他系统开发具有高储能性能的电容器提供了一种实用的方法。

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Lead-free (Na1–1.5xBixLa0.5x)(Nb1-xMgx)O3 ceramics with high energy storage performance via ionic co-doping induced local antiferroelectric phases coexistence

Antiferroelectric materials have garnered considerable interest for pulsed power applications because of their reversible antiferroelectric-ferroelectric (AFE-FE) phase transition under an electric field. However, pure NaNbO₃ exhibits ferroelectric phase characteristics at room temperature under an electric field, resulting in low energy storage performance. We prepared lead-free (Na_1–1.5xBi_xLa_0.5x)(Nb_1-xMg_x)O₃ ceramics via inducing local antiferroelectric phases coexistence by ion co-doping. The P-R phase transition temperature was shifted below room temperature, which promotes the formation of polar nanoregions and achieves a favorable ΔP value (52 μC·cm⁻²) when x = 0.06. Consequently, the sample with x = 0.06 achieved a high energy storage density (8.24 J·cm⁻³), energy storage efficiency (93.7 %), and energy storage potential (23.54 J·cm⁻²·MV⁻¹) at 350 kV·cm⁻¹, while exhibiting excellent frequency (1–1000 Hz) and temperature (25–150 °C) stability. This work presents a practical approach to develop capacitors with high energy storage performance for other systems under the same electric field range.

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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.