scholarly journals Electromagnetic Wave Shielding Effectiveness Based on Carbon Microcoil-Polyurethane Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Gi-Hwan Kang ◽  
Sung-Hoon Kim
Keyword(s):  
Electromagnetic Wave ◽  
Chemical Vapor Deposition ◽  
Layer Thickness ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Shielding Effectiveness ◽  
Frequency Range ◽  
Thermal Chemical Vapor Deposition ◽  
Shielding Properties ◽  
Polyurethane Composites

Carbon microcoils (CMCs) were deposited onto Al2O3substrates using C2H2/H2as source gases and SF6as an incorporated additive gas in a thermal chemical vapor deposition system. CMC-polyurethane (PU) composites were obtained by dispersing the CMCs in the PU with a dimethylformamide additive. The electromagnetic wave shielding properties of the CMC-PU composites were examined in the frequency range of 0.25–1.5 GHz. The shielding effectiveness (SE) of the CMCs-PU systematically increases with increasing the content of CMCs and/or the layer thickness. Based on these results, the main SE mechanism for this work was suggested and discussed.

Carbon Coils-Polyurethane Composites for the Shielding Materials of Electromagnetic Interference

2014 ◽  
Vol 95 ◽  
pp. 50-55
Author(s):  
Gi Hwan Kang ◽  
Sung Hoon Kim
Keyword(s):  
Vapor Deposition ◽  
Electromagnetic Interference ◽  
Chemical Vapor ◽  
Weight Percent ◽  
Shielding Effectiveness ◽  
Frequency Range ◽  
Thermal Chemical Vapor Deposition ◽  
Shielding Properties ◽  
Polyurethane Composites ◽  
Continuous Injection

The carbon coils (d-CCs) having the diverse geometries were deposited on Al2O3 substrate by continuous injection of SF6 in C2H2 source gas under the thermal chemical vapor deposition system. d-CCs with polyurethane (PU) composites (d-CCs@PU) were fabricated by dispersing d-CCs in PU solvent with dimethylformamide (DMF) additive. The electromagnetic wave shielding properties of d-CCs@PU composites were investigated in the frequency range of 0.25-1.5 GHz. The shielding effectiveness (SE) of d-CCs@PU composites were measured and discussed according to the weight percent of d-CCs in CCs@PU composites and the thickness of d-CCs@PU composites layers. Based on these results, we discussed the shielding properties of d-CCs@PU composites and the main mechanism of the SE in this work.

Precise control of chemical vapor deposition graphene layer thickness using NixCu1−x alloys

2015 ◽  
Vol 3 (7) ◽  
pp. 1463-1467 ◽  
Author(s):  
Hyonkwang Choi ◽  
Yeongjin Lim ◽  
Minjeong Park ◽  
Sehui Lee ◽  
Younsik Kang ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Layer Thickness ◽  
Vapor Deposition ◽  
Graphene Layer ◽  
Chemical Vapor ◽  
Graphene Layers ◽  
Precise Control ◽  
Thermal Chemical Vapor Deposition ◽  
Chemical Vapor Deposition Graphene

We investigated a simple but effective method to precisely control the desired number of graphene layers on the NixCu1−x alloy substrates by thermal chemical vapor deposition.

Ti3C2MXenes modified with in situ grown carbon nanotubes for enhanced electromagnetic wave absorption properties

2017 ◽  
Vol 5 (16) ◽  
pp. 4068-4074 ◽  
Author(s):  
Xinliang Li ◽  
Xiaowei Yin ◽  
Meikang Han ◽  
Changqing Song ◽  
Hailong Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electromagnetic Wave ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Catalytic Chemical Vapor Deposition ◽  
Wave Absorption

Ti3C2TxMXenes modified within situgrown carbon nanotubes (CNTs) are fabricatedviaa simple catalytic chemical vapor deposition (CVD) process.

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