Improvment of electrocaloric energy storage properties in eco-friendly 0.63Na0.5Bi0.5TiO3-0.37SrTiO3-NaNbO3 ceramic synthesized by sol–gel route

IF 2.8 4区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Materials Science: Materials in Electronics Pub Date : 2025-03-03 DOI:10.1007/s10854-025-14471-1

P. Eswara Satyanarayana, Kasaram Roja, N. Giridhar Babu, Bharat Kumar Dhangar, Sk. Akram, G. Bhanu kiran, Thiriveedhi Narendrudu, N. Ch. Ramesh Babu, A. Kalpana

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Abstract

The conventional solid-state reaction technique was used to create the lead-free ceramic composition of 0.63Na_0.5Bi_0.5TiO₃–0.37SrTiO₃–NaNbO₃. A single-phase monoclinic crystal structure with Cc symmetry and a tetragonal P4mm phase has been confirmed using X-ray diffraction studies. Polarization and strain evaluated under an applied electric field have been employed to demonstrate whether these ceramics switched from ferroelectric to antiferroelectric characteristics. Surprisingly, with an electric field of 25 kV/cm, the induced electrocaloric effect (ECE) for the 0.63Na_0.5Bi_0.5TiO₃–0.37SrTiO₃–NaNbO₃ ceramic exhibited a notable temperature change (ΔT) that was nearly 2.59 K. Furthermore, a high energy density of 3.96 J/cm³ and efficiency of 80.13% were observed throughout a broad range of temperatures and frequencies, from 30 °C to 150 °C and 1 Hz, respectively, using an electric field with an intensity of 150 kV/cm. The ECE response and isothermal entropy change (ΔS) occurring simultaneously suggest that there is a great deal of potential for use in electronic devices.

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改善溶胶-凝胶路线合成的环保型 0.63Na0.5Bi0.5TiO3-0.37SrTiO3-NaNbO3 陶瓷的电化学储能特性

采用传统固相反应法制备了0.63Na0.5Bi0.5TiO3-0.37SrTiO3-NaNbO3无铅陶瓷材料。用x射线衍射研究证实了具有Cc对称和四方P4mm相的单相单斜晶体结构。利用外加电场下的极化和应变来证明这些陶瓷是否从铁电特性转变为反铁电特性。令人惊讶的是，在25 kV/cm的电场下，0.63Na0.5Bi0.5TiO3-0.37SrTiO3-NaNbO3陶瓷的感生电热效应（ECE）表现出显著的温度变化（ΔT），接近2.59 K。此外，在30°C至150°C和1 Hz的宽温度和频率范围内，使用强度为150 kV/cm的电场，可以观察到3.96 J/cm3的高能量密度和80.13%的效率。ECE响应和等温熵变（ΔS）同时发生，表明在电子设备中有很大的应用潜力。

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来源期刊

Journal of Materials Science: Materials in Electronics 工程技术-材料科学：综合

CiteScore

5.00

自引率

7.10%

发文量

1931

审稿时长

2 months

期刊介绍： The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.