3D printed SiC nanowire reinforced composites for broadband electromagnetic absorption
3D printed SiC nanowire reinforced composites for broadband electromagnetic absorption
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用于宽带电磁吸收的 3D 打印 SiC 纳米线增强复合材料
DOI：
10.1016/j.ceramint.2019.03.015
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发表时间：
2019
影响因子：
5.2
通讯作者：
Cheng Laifei
中科院分区：
文献类型：
--
作者：
Xiao Shanshan;Mei Hui;Han Daoyang;Cheng Laifei
采用3D-SL印刷技术制备了具有宽带电磁吸收能力的碳化硅纳米线/丙烯酸树脂(SiCnw/ACR)复合材料。复合材料的电磁吸收能力可以通过调节SiCnW的含量和印刷层的厚度来调节。当SiCnw含量为3 wt%，印刷层厚度为25 μm-50 μm时，由于材料与自由空间之间的高介电损耗和适当的阻抗匹配，无论是在C、X还是Ku波段，SiCnw/ACR复合材料都具有最佳的宽有效吸收带宽和高的电磁吸收效率。在C波段(4-8 GHz)，EAB达到2.9 GHz，反射损耗(RL)达到−34.1 分贝；在X波段(8-12 GHz)，EAB达到4 GHz，覆盖整个X频段，RL达到−34.5 分贝；在Ku波段(12-18 GHz)，EAB超过6 GHz，覆盖整个Ku波段，RL达到−34.7 分贝。该研究对快速制备具有任意复杂形状和高效宽带电磁吸收能力的零件、壳体或器件具有重要意义。
SiC nanowire/acrylic resin (SiCnw/ACR) composites with broadband electromagnetic (EM) absorption capabilities were fabricated by a novel procedure using 3D stereolithography (3D-SL) printing technology. The EM absorption abilities of the composites can be adjusted by tuning the SiCnwcontent and the thickness of the printing layer. When the SiCnwcontent is 3 wt% and the thickness of the printing layer is 25 μm–50 μm, the SiCnw/ACR composite has an optimally broad effective absorption bandwidth (EAB) and a high efficiency for EM absorption, whether assessing the C, X or Ku band, because of the high dielectric loss and proper impedance matching between the materials and free space. In the C band (4–8 GHz), the EAB reaches 2.9 GHz, and the reflection loss (RL) reaches −34.1 dB; in the X band (8–12 GHz), the EAB reaches 4 GHz, which covers the entire X band, and the RL reaches −34.5 dB; in the Ku band (12–18 GHz), the EAB exceeds 6 GHz, which covers the whole Ku band, and the RL reaches −34.7 dB. This research is of great importance to the rapid preparation of parts, shells or devices with arbitrarily complex shapes and high efficiency broadband EM absorption abilities.