论文部分内容阅读
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。
Iron-containing single-walled carbon nanotubes (SWCNTs) were prepared by arc method and were purified and then doped into nanocrystalline M-type hexagonal barium ferrite (BaFe12O19) nanocrystalline powders prepared by sol-gel autoignition. With the mesh structure of the composite material. The electromagnetic parameters of the samples were tested by coaxial method, and the microwave absorbing properties of SWCNTs / BaFe12O19 composites with different mixing ratios were studied. The results show that the magnetic loss of the composite powders SWCNTs / BaFe12O19 is mainly due to natural resonance and exchange resonance. When the content of SWCNTs is 2% (mass fraction), the maximum attenuation of microwave reflection can reach 24.85 dB, higher than 10 dB Bandwidth can reach 6.30 GHz with a wide band of absorbers.