Improved Energy Storage and Electrocaloric Properties in Sm3+- and Fe3+-Substituted BCZT Ceramics

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2024-11-11 DOI:10.1007/s11664-024-11543-6

Neha, Parveen Kumar, Vidushi Karol, Preeti Sharma, Surjeet Chahal, Chandra Prakash

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引用次数: 0

Abstract

Polycrystalline ceramics with the composition 0.45BaTi_0.80Zr_0.20O₃-0.55Ba_0.69Ca_0.30Sm_0.01Ti_0.99Fe_0.01O₃ were prepared using the solid-state reaction route. The phase formation of the prepared sample was confirmed by x-ray diffraction (XRD) study. The temperature-dependent dielectric permittivity (ε) showed a diffuse phase transition. The observance of ferroelectricity at temperatures above the Curie temperature (T_C) suggests the presence of nano-polar regions in the sample. The efficiency (ƞ), recoverable energy density (W_rec), and loss (W_loss) were determined from the P–E loops. The efficiency (ƞ) increased with an increase in temperature, while W_loss showed a reverse trend. The measured value of W_rec was 0.10 J/cm³, and a value of 94% was found for ƞ. The electrocaloric effect (ECE) was studied using the indirect method, and an adiabatic change in temperature (ΔT) of 0.34 K was found at 25 kV/cm with an electrocaloric coefficient = 0.0136 K cm kV⁻¹. These results suggest that this composition can be used in energy storage and electrocaloric applications.

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改善 Sm3+- 和 Fe3+ 取代的 BCZT 陶瓷的储能和电致发光性能

采用固相反应法制备了组成为0.45 bati0.80 zr0.200 o3 -0.55 ba0.69 ca0.30 sm0.01 ti0.99 fe0.010 o3的多晶陶瓷。通过x射线衍射（XRD）研究证实了所制备样品的相形成。随温度变化的介电常数ε表现为扩散相变。在居里温度（TC）以上的温度下观察到的铁电性表明样品中存在纳米极区。从P-E回路测定效率（±）、可恢复能量密度（Wrec）和损耗（Wloss）。效率（±）随温度的升高而增加，而Wloss则呈相反趋势。Wrec的实测值为0.10 J/cm3，而其中的平均值为94%。用间接方法研究了热效应（ECE），发现在25 kV/cm下，温度（ΔT）绝热变化为0.34 K，电热系数为0.0136 K cm kV−1。这些结果表明，该组合物可用于储能和电热应用。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.