摘要
通过热溶剂法制备了空心Fe_(3)O_(4)/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Fe_(3)O_(4)纳米粒子组成,空心球的平均尺寸约为400nm,CNT与Fe_(3)O_(4)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Fe_(3)O_(4)的磁导率贡献,两者达到了良好的阻抗匹配。
Hollow Fe_(3)O_(4)/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 Fe_(3)O_(4) nanoparticles with the size of about 30nm.The paraffin containing 40wt% hollow Fe_(3)O_(4)/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 Fe_(3)O_(4),good impedance matching can be obtained.
作者
安静
赵晨阳
牟星
郭世海
徐立红
赵栋梁
An Jing;Zhao Chenyang;Mu Xing;Guo Shihai;Xu Lihong;Zhao Dongliang(Central Iron and Steel Research Institute,Beijing 100081)
出处
《化工新型材料》
CAS
CSCD
北大核心
2022年第9期144-149,共6页
New Chemical Materials
基金
国家重点研发计划项目(2018YFB0905600)
钢铁研究总院重大基金项目(事20021730ZD)。
关键词
磁性材料
纳米粒子
吸波性能
空心四氧化三铁
magnetic material
nanoparticle
microwave absorption
hollow Fe_(3)O_(4)
