Materials
·
2023
·Vol. 16
·期 20
·6752
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IF 3.4
Weidong Zhang,Haoliang Wen,Yaping Gou,Yun Zhao,Zhiqiang Zhang,Yali Qiao
The challenge of developing a high-efficiency microwave absorbent remains, because of the compatibility between microwave absorption and high-temperature-resistant performance in practical application. Herein, a facile method is used to obtain serial MXene/BN-zxy composites, where zx:y indicates the weight ratio of MXene and boron nitride (BN) in the composites, with adjustable microwave absorption performance (MAP) which can be regulated by the ratio of MXene and the BN nanosheet. In particular, the as-prepared absorbents with supercapacitance-like structure significantly enhanced the MAP and could be served more than 900 °C. The results of MAP reveal that the minimum reflection loss (RL) can reach −20.94 dB with a MXene/BN-101 composite coating thickness of 4.0 mm; the effective attenuation bandwidth (RL< −10 dB, i.e., 90% microwave energy is attenuated) is up to 9.71 GHz (7.94–17.65 GHz). From a detailed analysis, it is observed that attenuation is the critical limiting factor for MAPs rather than impedance mismatch, which can be assigned to the poor MAP of BN nanosheets. In any case, as-prepared absorbents have potential applications in the field of heating components.
研究领域:
材料科学
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电磁材料
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复合材料
·
微波工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Electronic Materials
·
2025
·Vol. 11
·期 8
·2400738
·
IF 5.3
Guodong Han,Song Zhao,Sai Sui,Bo Feng,Yudeng Wang,Junxiang Zhou,Zhuolun Li,Xiaoxia Tian,Yuxiang Jia,Jiafu Wang,Shaobo Qu
Metal–Organic-Frameworks (MOFs) are commonly used as microwave-absorbing materials after pyrolysis treatment. Rare researchers treat MOFs as non-conductive materials and use them as absorbing materials directly. In this paper, MOFs@P-C-800 composite materials are prepared adopt to hydrothermal and ultrasonic dispersion methods by regulating the morphological characteristics of MOFs and the content of P-C-800. As for the Co-BDC-P-C-800, the maximum reflection loss reaches −18.4 dB at 14.29 GHz and the effective absorption bandwidth (EAB) achieves 3.87 GHz from 13.5 to 17.37 GHz. After the contents of P-C-800 is adjusted, the Co-BDC-P-C-800 (0.05 g) exhibited excellent microwave absorption performance, the maximum RL value of −60 dB at 13 GHz with a thickness of 2.0 mm, and the EAB achieves 5.91 GHz from 12.02 to 17.93 GHz. This paper not only provides new application direction for MOFs, but also offers a promising direction for the research and development of absorbing materials.
研究领域:
材料科学
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微波吸收材料
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纳米复合材料
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电磁功能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yuchi Dong,Yalan Liang,Haoyu Gao,Xianyu Jiang,Linbo Zhang,Liangjun Yin,Le Yuan,Xin Wang,Guo Jing
Magnetic metal absorbers will inevitably suffer from corrosion and aging failure in actual application environments (air, salt spray, acid/alkali, etc.), resulting in serious deterioration of their performance. Using inert, densified materials to modify absorber surface is an effective and feasible solution. Herein, a core-shell structure carbonyl iron composite absorbent (CIP@2-MI/MBI/EP) was prepared by in-situ polymerization with 2-methylimidazole (2-MI), 2-mercaptobenzimidazole (MBI), epoxy resin (EP) as the precursor, and carbonyl iron powder (CIP) as the core. The core-shell structure has enhanced both of corrosion resistance and microwave absorbing performance due to the effect of alleviating the intrusion of corrosive media and low dielectric characteristics of the corrosion inhibitors MBI and EP. The results of electromagnetic parameter test exhibited the minimum reflection loss(RL) of the modified absorbent at 13.78 GHz is -69.57 dB, and the thickness is only 1.65 mm. Electrochemical tests revealed the corrosion potential (E corr )of the composite powder shifted positively from -0.680 V to -0.012 V compared to original CIP. The corrosion current (i corr ) decreased from 59.1 μA/cm 2 to 0.1562 μA/cm 2 , and the annual corrosion rate (CR) decreased by 2 orders of magnitude to 0.0223 mil/year. These results attest to the exceptional corrosion resistance of the composites. In addition, the results of salt spray experiments revealed that the morphology and composition of CIP@2-MI/MBI/EP absorbers remained largely unchanged after 720 H salt spray test. Meanwhile, the acid resistance test (PH=1) further demonstrated the outstanding anti-corrosion performance of the composites. The research offers a new option for the development and design of high-efficiency microwave absorbent with robust corrosion resistance.
研究领域:
材料科学
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微波吸波材料
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腐蚀科学
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电磁波吸收
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Shaoyin Wang,Jianqiang Bi,Guandong Liang,Jilie Yuan,Yueguang Chen,Linjing Qiao
The TiB 2 fibers were prepared by a chloride-assisted carbothermic method accompanied with the vapor-liquid-solid (VLS) mechanism. The influences of TiO 2 , B 2 O 3 , C 12 H 22 O 11 , and calcination temperature on the yield of TiB 2 fibers were investigated. In addition, the effects of TiB 2 fibers content on the electromagnetic (EM) parameters and microwave absorption (MA) properties of TiB 2 fibers/paraffin composite was studied in detail. The TiB 2 fibers/paraffin composite showed excellent microwave absorption performance, with an optimized reflection loss ( RL ) of −46.63 dB at 14 GHz and a thickness of 1.5 mm. Moreover, it exhibited a broad effective absorption bandwidth (EAB) ( RL < −10 dB) of 3.9 GHz, ranging from 12 to 15.9 GHz. TiB 2 fibers exhibit promising potential as materials for high-temperature applications in the field of MA.
研究领域:
材料科学
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电磁波吸收
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高温应用
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）