化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (9) : 144-149. DOI: 10.19817/j.cnki.issn1006-3536.2022.09.029

科学研究

空心Fe₃O₄/CNT复合材料的制备与吸波性能研究

安静, 赵晨阳, 牟星, 郭世海, 徐立红, 赵栋梁

作者信息 +

Synthesis and microwave absorption property of hollow Fe₃O₄/CNT composite

An Jing, Zhao Chenyang, Mu Xing, Guo Shihai, Xu Lihong, Zhao Dongliang

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Received		Published
2021-05-27		2022-09-20
Issue Date	Revised Date
2022-09-27	2021-05-27

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摘要

通过热溶剂法制备了空心Fe₃O₄/碳纳米管(CNT)复合材料,并对其结构、磁性和吸波性能进行研究。发现空心球是由尺度为30nm的Fe₃O₄纳米粒子组成,空心球的平均尺寸约为400nm,CNT与Fe₃O₄空心球表面结合紧密。吸波性能研究发现含有40%复合材料的石蜡样品在5.0mm厚度下,具有最佳吸收性能(-29.8dB),当样品厚度为3.0mm时,有效吸收带宽为2.47GHz(7.2～9.67GHz)。复合材料的吸波性能,主要来源于CNT的介电损耗和Fe₃O₄的磁导率贡献,两者达到了良好的阻抗匹配。

Abstract

Hollow Fe₃O₄/carbon nanotube (CNT) composites were synthesized by hydrothermal method.Their microstructure,magnetic properties and electromagnetic wave absorbability were studied.The microstructure analysis shown that the particles were attached tightly on the surface of the CNT,displaying average diameter of about 400nm,and were consist by many Fe₃O₄ nanoparticles with the size of about 30nm.The paraffin containing 40wt% hollow Fe₃O₄/CNT displayed reflection loss value of -29.8dB when the thickness was 5.00mm,and the composites' widest effective bandwidth was 2.47GHz(7.2～9.67GHz) at thickness of 3.0mm.Owning to the synergistic effort of dielectric loss coming from CNT and magnetic loss from Fe₃O₄,good impedance matching can be obtained.

关键词

磁性材料 / 纳米粒子 / 吸波性能 / 空心四氧化三铁

Key words

magnetic material / nanoparticle / microwave absorption / hollow Fe₃O₄

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空心Fe₃O₄/CNT复合材料的制备与吸波性能研究[J]. 化工新型材料, 2022, 50(9): 144-149 DOI:10.19817/j.cnki.issn1006-3536.2022.09.029

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