摘要
用电弧法制备含铁的单壁碳纳米管(SWCNTs),并将其提纯之后掺杂到用溶胶-凝胶自燃法制备的M型六角钡铁氧体(BaFe12O19)纳米晶粉体中,得到了具有网状结构的复合材料。利用同轴法测试了样品的电磁参数,研究了不同混合比SWCNTs/BaFe12O19复合材料的吸波性能。结果表明:复合粉体SWCNTs/BaFe12O19的磁损耗主要是由于自然共振和交换共振引起的;当掺杂2%(质量分数)SWCNTs时,微波反射衰减最大值可以达到24.85 dB,高于10 dB的频带宽度可以达到6.30 GHz,具有较宽的吸波频段。
The Fe-filled single-walled carbon nanotubes（SWCNTs） were fabricated by a DC arc discharge method.After purification process and then doped the very substance into the nanocrystalline M-type barium hexaferrite（BaFe12O19）,which was synthesized by a sol-gel auto-combustion method.The electromagnetic parameters of the samples were tested using coaxial method,and microwave absorption properties of SWCNTs/BaFe12O19 composite with different doping ratios were investigated.The results indicate that the magnetic loss of composite SWCNTs/BaFe12O19 is mainly attributed to the natural resonance and exchange resonance.When doping 2% mass fraction of SWCNTs,the maximum reflection loss of composite can reach 24.85dB and the frequency band width of above 10dB is 6.30GHz,which is a wide microwave absorption frequency band.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2011年第4期112-116,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(10974131)
上海市教育委员会科技创新基金(09ZZ85)
关键词
单壁碳纳米管
铁氧体
复合材料
微波吸收
single-walled carbon nanotubes（SWCNTs）
ferrite
composite material
microwave absorption
