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利用电阻仪及自制的波导管,分别测试了不同含量的碳纳米管和碳纳米粉复合材料的导电性能和电磁波的屏蔽效能.结果表明,复合材料的导电性能和其对电磁波的屏蔽效能与复合材料中导电材料的含量密切相关,且碳纳米管和碳纳米粉的加入量存在一临界阈值.并且复合材料中碳纳米管加入量的临界阈值远远低于碳纳米粉的临界阈值.
The electrical conductivity and electromagnetic shielding effectiveness of carbon nanotubes and carbon nano-powders with different contents of carbon nanotubes and carbon nano-powders were tested respectively by means of electrical resistance meter and self-made waveguides. The results show that the electrical conductivity of composites and their shielding effectiveness and composition The content of conductive material in the material is closely related, and there is a critical threshold for the addition amount of carbon nanotubes and carbon nano-powders, and the critical threshold of the amount of added carbon nanotubes in the composite material is far lower than the critical threshold of the carbon nano-powder.