Double-layer structural design of dielectric ordered mesoporous carbon/paraffin composites for microwave absorption
Double-layer structural design of dielectric ordered mesoporous carbon/paraffin composites for microwave absorption
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DOI：
10.1007/s00339-012-6906-6
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发表时间：
2012-04
期刊：
影响因子：
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通讯作者：
Hongjing Wu;Liuding Wang;Shaoli Guo;Zhongyuan Shen
中科院分区：
文献类型：
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作者：
Hongjing Wu;Liuding Wang;Shaoli Guo;Zhongyuan Shen
制备了以有序介孔碳（OMC）为吸收剂、石蜡为基体的吸波材料，通过改变OMC的质量分数，在2-18 GHz范围内调节其电磁和吸波性能。对于填充1.98wt.%的单层吸收体，在8.0 GHz处的最小反射损耗（RL）值达到-9.3 dB，并且在5.8-14.4 GHz处获得RL低于-5 dB的吸收范围OMC为3.0 mm。如果采用双层结构，吸收体的总厚度可以减小到2.0 mm以下，有效吸收范围（RL<-10 dB）在8.9-14.3 GHz，最小RL在10.6 GHz为-28.5 dB。研究表明，采用合理的多层结构，介电复合材料可以作为优良的吸波材料。
Microwave absorbing materials composed of ordered mesoporous carbon (OMC) as absorbent and paraffin as matrix were prepared, and their electromagnetic and microwave absorbing properties could be tuned by changing the weight fraction of OMC at 2–18 GHz. The minimum reflection loss (RL) value reached −9.3 dB at 8.0 GHz and the absorption range withRLlower than −5 dB was obtained at 5.8–14.4 GHz for a single-layer absorber filled with 1.98 wt.% OMC at 3.0 mm. If a double-layer structure was adopted, the total thickness of the absorber could be reduced below 2.0 mm and the effective absorption range (RL<−10 dB) could be obtained at 8.9–14.3 GHz with a minimalRLof −28.5 dB at 10.6 GHz. This work demonstrated that dielectric composites could be used as excellent absorbers by adopting reasonable multilayer structures.