5G-based high-performance electromagnetic shielding material and preparation method thereof
An electromagnetic shielding material, high-performance technology
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[0022] A high-performance electromagnetic shielding material based on 5G with a volume density of less than 2.5g / cm 3 , composed of three-dimensional network foam carbon, silicon carbide nanowires, graphene, and resin. It is characterized in that silicon carbide nanowires are grown in situ inside the carbon foam, graphene is uniformly dispersed in the resin, and the resin containing graphene is filled inside the carbon foam reinforced by the silicon carbide nanowires.
[0023] The foamed carbon is obtained by pyrolysis of organic foam, the interior is a three-dimensional network structure, the cross-section of the cell wall is circular, the porosity is 70%, the pore diameter is 50 μm and the distribution is uniform, the conductivity is 0.46S / cm, and the reflection loss reaches - 15dB, the electromagnetic shielding effectiveness is greater than 48dB.
[0024] The particle size of the graphene is 1 μm, and the content is 15%wt; the resin is a phenolic resin; the conductivity of...
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