V掺杂Ti3AlC2的吸波性能及高温稳定性

doi:10.15541/jim20260279

无机材料学报

V掺杂Ti₃AlC₂的吸波性能及高温稳定性

常玉凯¹, 柴澎博¹, 蔡依宁¹, 霍英杰², 刘伟³, 孙晓辉¹, 周爱国¹

1.河南理工大学材料科学与工程学院, 焦作 454003;
2.唐山师范学院物理科学与技术学院, 唐山 063009;
3.焦作市金川电子科技有限公司, 焦作 454003

收稿日期:2026-06-26 修回日期:2026-09-09
通讯作者: 孙晓辉, 讲师. E-mail: xiaohuisun@hpu.edu.cn; 周爱国, 教授. E-mail: zhouag@hpu.edu.cn
作者简介:常玉凯(1993-), 男, 副教授. E-mail: yukaichang12345@hpu.edu.cn
基金资助:
国家自然科学基金(52202364, 52372284); 河南省自然科学基金(262300420004); 河南理工大学基本科研业务费(NSFRF2602023); 河南省中央引导地方科技发展资金项目(Z20241471061)

Microwave Absorption Performance and Thermal Stability of V-doped Ti₃AlC₂

CHANG Yukai¹, CHAI Pengbo¹, CAI Yining¹, HUO Yingjie², LIU Wei³, SUN Xiaohui¹, ZHOU Aiguo

1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China;
2. School of Physical Science and Technology, Tangshan Normal University, Tangshan 063009, China;
3. Jiaozuo Jinchuan Electronic Technology Co., Ltd., Jiaozuo 454003, China

Received:2026-06-26 Revised:2026-09-09
Contact: SUN Xiaohui, lecturer. E-mail: xiaohuisun@hpu.edu.cn; ZHOU Aiguo, professor. E-mail: zhouag@hpu.edu.cn
Supported by:
National Natural Science Foundation of China (52202364, 52372284); Natural Science Foundation of Henan (262300420004); Fundamental Research Funds for Henan Polytechnic University (NSFRF2602023); Henan Central-Guided Local S&T Development Fund (Z20241471061)

摘要/Abstract

摘要： Ti₃AlC₂作为典型MAX相材料, 兼具较高导电性和优异热稳定性, 在电磁波吸收领域具有潜在应用价值。但过高的导电性易导致阻抗失配, 限制电磁波的有效入射。本研究引入过渡金属V对Ti₃AlC₂进行掺杂改性, 利用其与Ti相近的原子特性实现晶格调控与电子结构优化; 并以(Ti_0.7V_0.3)₃AlC₂为代表样品, 研究其结构特征、电磁参数、吸波性能及高温处理后的性能变化。结果表明, V掺杂未破坏Ti₃AlC₂的MAX相主体结构, 并显著提升其吸波性能; 与纯Ti₃AlC₂相比, (Ti_0.7V_0.3)₃AlC₂的介电响应得到调节, 阻抗匹配得以改善, 其最小反射损耗由-9.13 dB降低至-51.48 dB, 对应匹配厚度仅为1.60 mm, 最大有效吸收带宽达到2.24 GHz。经600 ℃处理并冷却至室温后, (Ti_0.7V_0.3)₃AlC₂样品虽发生表面氧化, 介电损耗和衰减能力有所降低, 但最小反射损耗仍可达到-46.96 dB, 表明其经高温处理后具有一定的室温吸波性能。V掺杂通过优化阻抗匹配并协同调节极化损耗与导电响应, 显著改善了Ti₃AlC₂的吸波性能, 为兼具高效吸波性能和热处理后性能保持能力的MAX相材料设计提供了实验依据。

关键词: MAX相, V掺杂, 电磁波吸收, 高温稳定性

Abstract: Ti₃AlC₂, a representative MAX-phase material, possesses high electrical conductivity and excellent thermal stability, making it a promising candidate for electromagnetic wave absorption. However, its excessively high conductivity readily causes impedance mismatch and hinders effective penetration of incident electromagnetic waves. In this study, transition metal V was introduced into Ti₃AlC₂ to regulate its lattice and electronic structures by taking advantage of the similar atomic characteristics of V and Ti. (Ti_0.7V_0.3)₃AlC₂ was selected as a representative composition to investigate its structural characteristics, electromagnetic parameters, microwave absorption performance, and property evolution after high-temperature treatment. The results show that V doping preserves the MAX-phase framework of Ti₃AlC₂ while markedly enhancing its microwave absorption performance. Compared with pristine Ti₃AlC₂, V doping effectively regulates the dielectric response and improves impedance matching. Consequently, the minimum reflection loss is improved from -9.13 to -51.48 dB at a matching thickness of only 1.60 mm, with a maximum effective absorption bandwidth of 2.24 GHz. After heat treatment at 600 ℃ followed by cooling to room temperature, the sample undergoes surface oxidation, accompanied by decreases in dielectric loss and attenuation capability. Nevertheless, its minimum reflection loss remains as low as -46.96 dB, indicating that appreciable room-temperature microwave absorption performance is retained after high-temperature treatment. V doping therefore enhances the microwave absorption of Ti₃AlC₂ through the coordinated regulation of conductive response, polarization loss, and impedance matching, providing an experimental basis for designing MAX-phase absorbers that combine strong microwave absorption with performance retention after heat treatment.

Key words: MAX phase, V doping, microwave absorption, thermal stability

中图分类号:

TB34
TM25

常玉凯, 柴澎博, 蔡依宁, 霍英杰, 刘伟, 孙晓辉, 周爱国. V掺杂Ti₃AlC₂的吸波性能及高温稳定性[J]. 无机材料学报, DOI: 10.15541/jim20260279.

CHANG Yukai, CHAI Pengbo, CAI Yining, HUO Yingjie, LIU Wei, SUN Xiaohui, ZHOU Aiguo. Microwave Absorption Performance and Thermal Stability of V-doped Ti₃AlC₂[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20260279.

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V掺杂Ti₃AlC₂的吸波性能及高温稳定性

Microwave Absorption Performance and Thermal Stability of V-doped Ti₃AlC₂

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