文章基本信息

标题：Utilization of Fly Ash - A Waste Byproduct of Coal for Shielding Application
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作者：Monika Mishra, Avanish Pratap Singh, S. K. Dhawan
期刊名称：Journal of Environmental Nanotechnology
印刷版ISSN：2279-0748
电子版ISSN：2319-5541
出版年度：2013
期号：3923
页码：74-82
出版社：Institute for Environmental Nanotechnology
摘要：A matrix having conducting, magnetic and dielectric filler, due to their unique attenuation and electrical properties have shown their potential application in electromagnetic interference (EMI) shielding. However, the difficulties of reflection of microwave are yet to be overcome. Recently, exfoliated graphite along with iron oxide and fly ash found to a better alternate to the conventional shielding materials. Conductivity of composites lies in the range 0.013"14.57 S/cm. The microwave absorption properties of the composites have been studied in the 8.2-12.4 GHz (X-Band) frequency range which shows a shielding effectiveness upto 59.83 dB, which strongly depends on dielectric loss and weight fraction of fly ash and γ-Fe2O3 in EG matrix. Keywords : Composite materials, Magnetically ordered materials, X-ray diffraction (XRD), Scanning electron microscopy (SEM)