High energy storage performance under low electric fields and remarkable dielectric temperature stability in (Na0.5Bi0.5)TiO3-based lead-free ceramics

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2024-06-26 DOI:10.1016/j.solidstatesciences.2024.107616

Yating Ning, Yongping Pu, Zhemin Chen, Zixiong Sun, Lei Zhang, Qi Zhang, Chunhui Wu

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Abstract

Lead-free ceramic capacitors with superior energy storage properties and dielectric temperature stability are urgent needs for pulsed power devices. However, the risk of high voltage suppresses the improvement of comprehensive performance. Thus, a novel (1-x)(0.55Na_0.5Bi_0.5TiO₃-0.45Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃)-xBi(Mg_2/3Ta_1/3)O₃ (NBBCZT-xBMT) ceramics were successfully synthesized to address the above concerns. The addition of BMT is beneficial to maintaining high polarization strength, improving the breakdown strength and optimizing relaxor behavior. As a result, the optimum component exhibits excellent energy storage capability (W_rec = 3.05 J/cm³, η = 94.3 %) at 190 kV/cm and dielectric temperature stability (TCC ≤ ±10 % from 33 to 348 °C, tanδ ≤ 0.01 from 50 to 389 °C). Moreover, the corresponding sample maintains a variation of W_rec less than 6.7 % and η less than 1.6 % at 20–140 °C and 1–100 Hz. These results provide a novel candidate for high-performance ceramic capacitors under low electric fields.

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(Na0.5Bi0.5)TiO3基无铅陶瓷在低电场下的高储能性能和显著的介电温度稳定性

无铅陶瓷电容器具有卓越的储能特性和介电温度稳定性，是脉冲功率设备的迫切需要。然而，高电压的风险抑制了综合性能的提高。因此，为了解决上述问题，我们成功合成了一种新型 (1-x)(0.55Na0.5Bi0.5TiO3-0.45Ba0.85Ca0.15Zr0.1Ti0.9O3)-xBi(Mg2/3Ta1/3)O3（NBBCZT-xBMT）陶瓷。添加 BMT 有利于保持高极化强度、提高击穿强度和优化弛豫器行为。因此，最佳成分在 190 kV/cm 下具有出色的储能能力（Wrec = 3.05 J/cm3，η = 94.3 %）和介电温度稳定性（TCC 在 33 至 348 °C 之间≤ ±10 %，tanδ 在 50 至 389 °C 之间≤ 0.01）。此外，在 20-140 °C 和 1-100 Hz 的条件下，相应样品的 Wrec 变化率小于 6.7 %，η 变化率小于 1.6 %。这些结果为低电场下的高性能陶瓷电容器提供了一种新的候选材料。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.