单壁碳纳米管/六角钡铁氧体复合材料的微波吸收性能  

Microwave absorption properties of single-wall carbon nanotubes/barium hexaferrite composite

作　　者：贺可强[1] 郁黎明[1] 盛雷梅[1] 安康[1] 赵新洛[1] 

机构地区：[1]上海大学物理系低维碳材料与器件物理研究所,上海200444

出　　处：《复合材料学报》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)

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.

关 键 词：单壁碳纳米管 铁氧体 复合材料 微波吸收 

分 类 号：TM25[一般工业技术—材料科学与工程]