摘要: Ultrathin carbon foams with the thickness about 24 mm were fabricated by the pyrolysis of polyimide/ graphene composite foams. The addition of graphene was verified to stabilize the porous structure of the foams and accelerate their graphitization process simultaneously. Consequently, the well-defined carbon foams exhibited much higher electromagnetic interference (EMI) shielding effectiveness (SE) up to 24 dB over the frequency range of 8e12 GHz, in comparison with the non-foamed counterparts. The possible mechanism behind the phenomenon was attributed to their enhanced microwave absorption via the internal multiple scattering and reflections. Moreover, the SE could be further improved to 43 and 51 dB by increasing the sample thickness gradually to 51 and 73 mm, respectively. The carbon foams with high thermal stability are very promising in the fabrication of ultrathin EMI shields for thermally harsh applications.
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分类：
物理学
>>
普通物理:统计和量子力学,量子信息等
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引用：
ChinaXiv:201705.00607
(或此版本
ChinaXiv:201705.00607V1)
DOI:10.12074/201705.00607V1
CSTR:32003.36.ChinaXiv.201705.00607.V1
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科创链TXID：
2c7fb797-cb21-4307-a419-2f9ffd254054
- 推荐引用方式：
Li, Y [Li, Yang][ 1 ],Shen, B [Shen, Bin][ 1 ],Pei, XL [Pei, Xueliang][ 2 ],Zhang, YG [Zhang, Yonggang][ 2 ],Yi, D [Yi, Da][ 3 ],Zhai, WT [Zhai, Wentao][ 1 ],Zhang, LH [Zhang, Lihua][ 1 ],Wei, XC [Wei, Xingchang][ 3 ],Zheng, WG [Zheng, Wenge][ 1 ].Ultrathin carbon foams for effective electromagnetic interference shielding.null.[DOI:10.12074/201705.00607V1]
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