利用煤气化残渣构建Fe_(3)O_(4)和Fe负载的碳基复合吸波材料  

Fe_(3)O_(4)and Fe loaded carbon matrix composite microwave absorbents by recycling of coal gasification residue

作　　者：力国民[1] 侯如愿 毛璐涛 王喆 张克维[1] 梁丽萍[1] LI Guo-min;HOU Ru-yuan;MAO Lu-tao;WANG Zhe;ZHANG Ke-wei;LIANG Li-ping(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;China-Belarus Belt and Road Joint Laboratory on Electromagnetic Environment Effect,Taiyuan 030032,China)

机构地区：[1]太原科技大学、材料科学与工程学院,山西太原030024 [2]中国-白俄罗斯电磁环境效应“一带一路”联合实验室,山西太原030032

出　　处：《燃料化学学报（中英文）》2023年第4期562-570,共9页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(51802212);山西省自然科学基金(201801D221119);中国-白俄罗斯电磁环境效应“一带一路”联合实验室(ZBKF2022030802,ZBKF2022030702)资助。

摘　　要：本研究以煤气化残渣作为碳基载体,通过湿化学浸渍法和焙烧处理制得不同磁性组分负载的复合吸波材料。结果表明,在焙烧过程中,主要发生缓慢的碳热还原反应,磁性组分物相由Fe2O3、Fe_(3)O_(4)转变为Fe,同时碳热还原反应消耗掉一部分活性较高的碳,复合材料的石墨化程度变差。由于良好的阻抗匹配与衰减特性,复合材料FeCGR1000体现出更佳的吸波性能,当涂层厚度为2.0 mm时,最低反射损耗值为−25.3 dB,在涂层厚度为1.5 mm时,有效带宽达到4.0 GHz。本研究的开展不仅实现了煤气化残渣资源化利用,而且为煤气化残渣的高附加值应用提供新思路。In order to realize the effective resource utilization of coal gasification residues(CGR),the composite microwave absorbents loaded with different magnetic components were prepared through wet chemical impregnation and roasting progress,recycling of coal gasification residue as carbon-based carrier.The results showed that the main reaction involved in gradual carbothermal reduction reaction,during which the Fe2O3 and Fe_(3)O_(4)were transformed into Fe.And part of high-activity carbon in CGR was consumed as well,which resulted in the poor graphitization degree of CGR composites.Benefitted from the better impedance matching and attenuation characteristic,FeCGR1000 displayed excellent microwave absorbing performance.The reflection loss value reached−25.3 dB under the coating thickness of 2.0 mm,and the effective bandwidth kept 4.0 GHz as the coating thickness remained 1.5 mm.This work not only benefitted for realizing the resource utilization of CGR,but also provided new ideas for the high additional value application for CGR.

关 键 词：煤气化残渣 复合 微波吸收材料 资源化利用 

分 类 号：TB34[一般工业技术—材料科学与工程]