Effect of K0.5Bi0.5TiO3 on energy storage properties and temperature stability of Bi0.5Na0.5TiO3-Bi0.2Sr0.7TiO3 ceramics

IF 1.7 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Electroceramics Pub Date : 2023-06-10 DOI:10.1007/s10832-023-00318-w

Xiaofang Zhang, Weimin Xia, Yuanqing Chen, Yannan Liang

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Abstract

In order to improve the energy storage performance of Bi-based lead-free ceramics in dielectric capacitors, K_0.5Bi_0.5TiO₃ is doped into Bi_0.5Na_0.5TiO₃-Bi_0.2Sr_0.7TiO₃ (NBT-SBT) ceramics. We find that NBT-SBT-xK_0.5Bi_0.5TiO₃ (NBT-SBT-xBKT, x=0, 0.02, 0.03, 0.05 and 0.08) ceramic sheets maintain the perfect pure perovskite structures and show the character of relaxor ferroelectrics, indicating that the doped K⁺ ions smoothly infiltrate into the host lattice of binary system NBT-SBT ceramics and then disturb the long-range order of ferroelectric material and cause the lattice deformation in NBT-SBT. As such, the NBT-SBT-0.03BKT ceramic sample obtains dielectric constant (ε_r) of 1736, dielectric loss (tanδ) of 0.05, and energy storage efficiency (η) of 70.7%, respectively. More strikingly, NBT-SBT-xBKT ceramics exhibit excellent temperature stability, which helps to store energy at high temperatures. This paper can provide an effective method for manufacturing ceramic based capacitors with high energy storage property.

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K0.5Bi0.5TiO3对Bi0.5Na0.5TiO3-Bi0.2Sr0.7TiO3陶瓷储能性能和温度稳定性的影响

为了提高电介质电容器中 Bi 基无铅陶瓷的储能性能，在 Bi0.5Na0.5TiO3-Bi0.2Sr0.7TiO3 (NBT-SBT) 陶瓷中掺入了 K0.5Bi0.5TiO3。我们发现，NBT-SBT-xK0.5Bi0.5TiO3（NBT-SBT-xBKT，x=0、0.02、0.03、0.05 和 0.08）陶瓷片保持了完美的纯包晶结构，并显示出弛豫铁电特性，表明掺杂的 K+ 离子顺利渗入二元体系 NBT-SBT 陶瓷的主晶格中，进而扰乱了铁电材料的长程有序性，导致 NBT-SBT 的晶格变形。因此，NBT-SBT-0.03BKT 陶瓷样品的介电常数（εr）为 1736，介电损耗（tanδ）为 0.05，储能效率（η）为 70.7%。更引人注目的是，NBT-SBT-xBKT 陶瓷具有优异的温度稳定性，有助于在高温下储存能量。本文可为制造具有高储能特性的陶瓷基电容器提供一种有效方法。

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来源期刊

Journal of Electroceramics 工程技术-材料科学：硅酸盐

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

5.7 months

期刊介绍： While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including: -insulating to metallic and fast ion conductivity -piezo-, ferro-, and pyro-electricity -electro- and nonlinear optical properties -feromagnetism. When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice. The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.