Development of a hollow carbon sphere absorber displaying the multiple-reflection effect to attenuate electromagnetic waves
文献类型： 外文期刊
作者： Li, Dong-Ping 1 ; Sun, Yan-Chun 2 ; Wang, Xuan 1 ; Wu, Song 2 ; Han, Shi-Cheng 2 ; Yang, Ying 3 ;
作者机构： 1.Harbin Univ Sci & Technol, State Key Lab Breeding Base Heilongjiang Prov Die, Harbin 150080, Heilongjiang, Peoples R China
2.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Lab Qual & Safety Risk Assessment Aquat Prod Harb, Minist Agr, Harbin 150070, Heilongjiang, Peoples R China
3.Harbin Univ Sci & Technol, Coll Chem & Environm Engn, Harbin 150080, Heilongjiang, Peoples R China
期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）
ISSN： 2046-2069
年卷期： 2017 年 7 卷 60 期
页码：
收录情况： SCI
摘要： The development and use of hollow amorphous carbon spheres has been considered to be an efficient strategy to combat severe electromagnetic interference. In the current work, hollow carbon spheres were treated at various high temperatures to improve their graphitization levels and conductivity loss abilities in an attempt to best eliminate the unwanted electromagnetic wave. Of the various samples tested, the hollow carbon spheres obtained at 900 degrees C showed the best and excellent electromagnetic absorption, with a reflection loss value (RLmin) of up to -23.0 dB and the ability to effectively absorb frequencies spanning a range of 4.4 GHz, when using a sample layer with a thickness of only 1.5 mm. A mechanism for the electromagnetic absorption was proposed. Besides the strong conductivity, the occurrence of multiple reflections of electromagnetic waves in the interior void was indicated to strengthen the attenuation of the electromagnetic wave.
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