Ni@CN/SiCN纳米吸波材料制备与阻抗匹配  

Preparation and impedance matching of Ni@CN/SiCN nano-absorbing materials

作　　者：史桂梅[1] 田燊彤 尹佳成 SHI Guimei;TIAN Shentong;YIN Jiacheng(School of Science,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学理学院,沈阳110870

出　　处：《沈阳师范大学学报（自然科学版）》2020年第5期385-390,共6页Journal of Shenyang Normal University:Natural Science Edition

基　　金：辽宁省科技厅自然科学基金资助项目(20180550564)。

摘　　要：采用等离子直流电弧法制备了不同组分的Ni@CN/SiCN纳米吸波材料。通过X射线衍射、透射电镜、X射线光电子能谱、矢量网络分析等方法对样品的物相、形貌、表面组成以及不同条件下制备的样品的电磁参数进行了详细地研究。研究表明,改变SiC/CN量可以方便地调节Ni@CN/SiCN纳米材料的阻抗匹配。选择合适的阳极靶材比例和乙腈的通入量,能够优化Ni@CN/SiCN纳米材料的阻抗匹配,提高材料的吸波性能。氮掺杂产生新的极化中心和介电壳层CN/SiC引起的介电损耗与磁损耗的互补性,有效地改善了材料的吸波性能。当SiC为阳极靶材总质量的16.67%、乙腈15 mL时,制备的Ni@CN/SiCN阻抗匹配度最佳。在频率为10.83 GHz、厚度为2.24 mm时,反射损耗最大值达到-57.6 dB,且反射损耗小于-20 dB的频带范围为3.4~18.0 GHz。An arc-discharge method was adopted to synthesize Ni@CN/SiCN nano-absorbing materials with different SiC content.And their phase structure,morphology,surface composition,and microwave absorption were investigated in detail by powder X-ray diffraction(XRD),high-resolution transmission electron microscope(TEM),X-ray photoelectron spectroscopy(XPS),and vector network analyzer(VNA).The results show that the impedance matching degree of the Ni@CN/SiCN nano microwave absorbent can be conveniently tuned while the CN/SiCN content is changed.Meanwhile,the Ni@CN/SiCN nanomaterial hold the optimized impedance matching by adopting the appropriate anode target ratio and acetonitrile content,and their microwave absorption performance can be improved.The optimum impedance matching results from not only the new polarization centers due to the N doping but also the complementation between the dielectric loss caused by dielectric CN/SiCN and magnetic loss from Ni core.So the microwave absorption performance of the Ni@CN/SiCN can be effectively improved.When the SiC accounts for 16.67%of the total mass as the anodic target material,and the acetonitrile is 15 mL,the prepared Ni@CN/SiCN acquires an excellent impedance matching.The optimal reflection loss(RL)reach-57.6 dB at 10.83 GHz with a thin thickness of 2.24 mm,and the efficient absorption bandwidth(<-20 dB)ranges from 3.4 to 18.0 GHz.

关 键 词：吸波材料 镍 氮掺杂 直流电弧法 

分 类 号：O469[理学—凝聚态物理]