针对大量铁尾矿污染环境和城市电磁辐射污染严重的问题,采用铁尾矿粉作为电磁波吸收剂,制备了多孔结构吸波材料,以此提高固体废弃物利用率和减少城市电磁辐射污染。探究了铁尾矿掺量和干密度对多孔结构吸波材料力学性能和电磁吸波性能的影响。结果表明,在干密度为812kg/m3、铁尾矿掺量为30%(质量分数)条件下,多孔结构吸波材料的抗压强度为5.23MPa,吸水率为5.4%。当多孔吸波材料试件厚度为24mm时,其吸波性能最好,有效吸收带宽为11.8GHz,最低反射率为-36.9dB。
Aiming at the problems that a large number of iron tailings pollute the environment and urban electromagnetic radiation pollution is serious,porous structure absorbing material was prepared by using iron tailings powder as electromagnetic wave absorber to improve the utilization rate of solid waste and reduce urban electromagnetic radiation pollution.The effects of iron tailings content and dry density on the mechanical properties and electromagnetic absorbing properties of porous structure absorbing materials were investigated.The results showed that under the conditions of dry density of 812kg/m3 and iron tailings content of 30% (mass fraction),the compressive strength of porous structure absorbing material was 5.23MPa,and the water absorption rate was 5.4%.When the thickness of porous absorbing material specimen was 24mm,its absorbing performance was the best,with an effective absorption bandwidth of 11.8GHz and the lowest reflectivity of -36.9dB.
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基金资助
海口市重大科技计划项目(HK2021010);海南省重点资助项目(ZDYF2019119)
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