Ambient-condition synthesis of Cr2AlB2 phase via molten salt shielding for high-performance electromagnetic wave absorption

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2026-06-09 DOI:10.1007/s40843-025-3974-1

Peng Huang (, ), Zhangjue Wang (, ), Yuyang He (, ), Wei Li (, ), Yongqiang Chen (, ), Hailong Wang (, ), Rui Zhang (, ), Yanqiu Zhu (, ), Fan Zhang (, ), Bingbing Fan (, )

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引用次数: 0

Abstract

MAB-phase derived compounds have good wave-absorbing properties attributable to their unique layered structure and desirable properties. Among them, Cr₂AlB₂ is of great interest due to its good thermal and electrical properties. However, the conventional synthesis method of Cr₂AlB₂ needs to be carried out under inert gas protection to avoid oxidation, which greatly increases the cost and limits its development in the field of wave absorption. To resolve the issue, we have successfully synthesized high-purity Cr₂AlB₂ in air using the molten salt shield synthesis (MS³). It can not only isolate the interference of oxygen, but also reduces the synthesis temperature of Cr₂AlB₂, which is a cost-effective method. Also, Cr₂AlB₂ synthesized using MS³ exhibits excellent wave-absorbing properties. A minimum reflection loss (RL_min) of −42.10 dB at 12.6 GHz and a maximum effective absorption bandwidth (EAB_max) of 3.44 GHz are achieved at a thickness of 1.9 mm. Therefore, this study not only contributes to the large-scale synthesis of Cr₂AlB₂ materials but also offers valuable insights for its potential application in electromagnetic wave absorption.

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环境条件下熔盐屏蔽合成高性能电磁波吸收Cr2AlB2相

mab相衍生化合物由于其独特的层状结构和理想的性能而具有良好的吸波性能。其中，Cr2AlB2因其良好的热学和电学性能而备受关注。然而，传统的Cr2AlB2合成方法需要在惰性气体保护下进行，以避免氧化，这大大增加了成本，限制了其在波吸收领域的发展。为了解决这一问题，我们利用熔盐屏蔽法（MS3）在空气中成功合成了高纯度的Cr2AlB2。它既可以隔离氧的干扰，又可以降低Cr2AlB2的合成温度，是一种性价比高的方法。同时，用MS3合成的Cr2AlB2具有良好的吸波性能。厚度为1.9 mm时，12.6 GHz时的最小反射损耗（RLmin）为−42.10 dB，有效吸收带宽（EABmax）为3.44 GHz。因此，本研究不仅有助于Cr2AlB2材料的大规模合成，而且为其在电磁波吸收方面的潜在应用提供了有价值的见解。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.