微波辅助下高效电磁波吸收NiCo2O4的快速合成

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-05-30 DOI:10.1016/j.jmmm.2025.173207

Yujin Duan , Zijun Xie , Miaomiao Du , Xianting Feng , Qing Chang

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引用次数: 0

摘要

尽管NiCo2O4的合成方法和电磁波吸收性能有了长足的发展，但目前还缺乏大规模生产的绿色、快速的高性能NiCo2O4合成工艺。本文首次提出了微波辅助快速合成NiCo2O4的方法，将前驱体的制备时间缩短至90 s，显著提高了生产效率。通过优化金属盐和助溶剂的种类，探索NiCo2O4的主要损耗机理，提高其电磁波吸收性能。以乙酸酯和乙醇（A-Et）为原料制备的样品性能最好，有效吸收带宽为6.24 GHz (1.9 mm)，最小反射损耗为- 40.40 dB （5.24 GHz, 3.0 mm）。氧空位和晶格缺陷的存在主导了A-Et的电磁波损耗机制。该研究为高性能NiCo2O4的快速绿色合成提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Microwave-assisted rapid synthesis of NiCo2O4 with high-performance electromagnetic wave absorption

Despite the prosperous development in synthesis methods and electromagnetic wave absorption performance of NiCo₂O₄, the green and rapid synthesis process of high-performance NiCo₂O₄ with large-scale production is still lack so far. Herein, a microwave-assisted rapid synthesis method was proposed for the first time to harvest NiCo₂O₄, which shortened the preparation time of precursor to 90 s and significantly improved the production efficiency. The type of metal salts and cosolvents were optimized to explore the dominant loss mechanism and improve the electromagnetic wave absorption performance of NiCo₂O₄. The best performance appears in the sample resulting from acetates and ethanol (A-Et), with an effective absorption bandwidth of 6.24 GHz (1.9 mm), and minimum reflection loss of −40.40 dB (5.24 GHz, 3.0 mm). The existence of oxygen vacancy and lattice defect dominate the electromagnetic wave loss mechanism of A-Et. This study provides a new insight for the rapid green synthesis of high-performance NiCo₂O₄.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.