The increasing development of communication technology and electromagnetic pollution have accelerated the research and optimization of electromagnetic microwave absorbing materials. There are few studies and reports on the creation electromagnetic microwave absorbing materials from industrial waste, despite the abundance and promise of research preparing of microwave absorbing materials utilizing sustainable resources from biomass. Herein, we prepared carbon-based microwave absorbing materials GCB-800, HTCB-800, and CDLB-800 using three different industrial solid waste bitumens, namely, coal direct liquefaction bitumen, high-temperature coal bitumen, and globular coal bitumen, as raw materials by using the thermal activation method. Due to the excellent porous carbon skeleton structure and the FeO contained in its internal ash after the heat treatment, which enhances the internal dielectric properties, the CDLB-800 was found to perform very well at the filler amount of 10 wt% obtained minimum reflection loss () is −52.41 dB at 10 wt% filler and matched thickness = 2.1 mm, and the effective absorption bandwidth (EAB) is 4.88GHz, with 87.14% absorption for X-band in the 2-18GHz. This work not only promotes the development of the comprehensive utilization of solid waste in this field, effectively reduces the burden of solid waste on the environment, but also points out the direction for the development of microwave absorbing materials in the future.

中文翻译：

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不同煤沥青制备高性能沥青碳基吸波材料用于工业废沥青的高效处理

通信技术的日益发展和电磁污染加速了电磁吸波材料的研究和优化。尽管利用生物质可持续资源制备微波吸收材料的研究非常丰富且前景广阔，但关于从工业废物中制备电磁微波吸收材料的研究和报道却很少。本研究以煤直接液化沥青、高温煤沥青和球状煤沥青三种不同的工业固废沥青为原料，制备了碳基吸波材料GCB-800、HTCB-800和CDLB-800。采用热活化方法制备材料。由于优异的多孔碳骨架结构以及热处理后其内部灰分中含有的 FeO，增强了内部介电性能，发现 CDLB-800 在填料量为 10 wt% 时表现良好，获得了最小的反射损耗() 在 10 wt% 填料和匹配厚度 = 2.1 mm 时为 -52.41 dB，有效吸收带宽 (EAB) 为 4.88GHz，在 2-18GHz 内 X 波段吸收率为 87.14%。这项工作不仅推动了该领域固体废物综合利用的发展，有效减轻了固体废物对环境的负担，同时也为未来微波吸波材料的发展指明了方向。