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Composition and Structure Design of Co3O4 Nanowires Network by Nickel Foam with Effective Electromagnetic Performance in C and X Band
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-02-04 00:00:00 , DOI: 10.1021/acssuschemeng.9b00017
Weihua Gu 1 , Bin Quan 1 , Xiaohui Liang 1 , Wei Liu 1 , Guangbin Ji 1 , Youwei Du 2
Affiliation  

Effectively attenuating electromagnetic waves in the C and X band through composition and structure design remains a formidable challenge for most absorbing materials. To achieve tunable electromagnetic properties, in this study, one-dimensional (1D) Co3O4 nanowires were successfully grown onto the 3D porous nickel foam (NF) through a facile liquid synthesis. Herein, electromagnetic parameters and microperspective structures have been controlled via changing the hydrothermal temperature, more importantly, the as-prepared composites at 100 °C exhibited prominent microwave dissipation performance in gigahertz. The minimum reflection loss (RL) value reached −41.1 dB at a relatively small matching thickness of 2.1 mm, and the optimal effective bandwidth (RL < −10 dB) of 3.46 GHz at 2.3 mm was also achieved. It should be noted that the RL values of the obtained [email protected]3O4 samples appeared two and three sharp peaks at the thickness of 2.3 mm, 2.5 mm, respectively. Good impedance matching, efficient magnetic loss, dielectric loss, and suitable interfacial polarization should be indispensable for ideal microwave absorption. The porous binary [email protected]3O4 composites not only employ cost-effective raw materials for microwave-absorbing materials in many applications, but also dissipate incident microwave which is in favor of reducing severe electromagnetic pollution all over the world.

中文翻译:

碳泡沫和X波段具有有效电磁性能的镍泡沫Co 3 O 4纳米线网络的组成和结构设计

对于大多数吸收材料而言,通过成分和结构设计有效地衰减C和X波段中的电磁波仍然是一个艰巨的挑战。为了获得可调节的电磁性能,在本研究中,使用一维(1D)Co 3 O 4通过便捷的液体合成,纳米线成功地生长在3D多孔镍泡沫(NF)上。在此,通过改变水热温度来控制电磁参数和微观结构,更重要的是,所制得的复合材料在100°C时具有显着的千兆赫兹微波消散性能。最小反射损耗(RL)值在2.1 mm的较小匹配厚度下达到-41.1 dB,并且在2.3 mm处也达到了3.46 GHz的最佳有效带宽(RL <-10 dB)。需要说明的是,得到的[受电子邮件保护] 3 O 4的RL值样品分别在2.3 mm,2.5 mm的厚度处出现两个和三个尖峰。对于理想的微波吸收来说,良好的阻抗匹配,有效的磁损耗,介电损耗和适当的界面极化是必不可少的。多孔二元[受电子邮件保护] 3 O 4复合材料不仅在许多应用中使用了具有成本效益的原材料作为微波吸收材料,而且还消散了入射微波,这有利于减少全世界的严重电磁污染。
更新日期:2019-02-04
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