Co_(3)O_(4)/Fe_(3)O_(4)/MXene复合纳米结构的电磁波吸收性能调制  

Modulation of Electromagnetic Wave Absorption in Co_(3)O_(4)/Fe_(3)O_(4)/MXene Composites

作　　者：李欣兴 魏鑫 LI Xin-xing;WEI Xin(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《安徽化工》2023年第2期65-72,共8页Anhui Chemical Industry

摘　　要：在电子设备快速发展和广泛使用的今日,电磁波辐射日益严重,影响了电子设备的正常运行及人类的身体健康。为了解决这个问题,选择具有特殊层状结构、高导电率和介电损耗性能极佳的二维材料MXene与磁性铁氧体复合,通过改进的两步法水热-溶剂热法制备棒状Fe_(3)O_(4)。为了进一步提高铁氧体的磁损耗性能,采用高温液相还原法将Co_(3)O_(4)附着在其表面,之后将不同比例的Co_(3)O_(4)/Fe_(3)O_(4)通过静电自组装的方式与MXene复合。经过电磁参数和性能的测试与计算,得到了Co_(3)O_(4)/Fe_(3)O_(4)/MXene复合材料,当其中的Co_(3)O_(4)/Fe_(3)O_(4)添加比例为25%时,在14.9 GHz频段,有着最高的RL值,厚度为8.5 mm,最佳RL值达到-49 dB,EAB为1.1 GHz。磁性材料与层状结构的MXene复合,有望成为优异的吸波器的候选材料之一。In today′s rapid development and widespread use of electronic devices,electromagnetic wave radiation is becom⁃ing increasingly serious,affecting the normal operation of electronic devices and the health of human beings.To solve this problem,we selected MXene,a two-dimensional material with a special layered structure,high electrical conductivity and excellent dielectric loss properties,to be compounded with magnetic ferrite.The rod-shaped Fe_(3)O_(4) was prepared by a modi⁃fied two-step hydrothermal-solvent thermal method.To further improve the magnetic loss performance of the ferrite,we used a high-temperature liquid-phase reduction method to attach Co_(3)O_(4) to its surface,after which different ratios of Co_(3)O_(4)/Fe_(3)O_(4) were compounded with MXene by electrostatic self-assembly.The composite of Co_(3)O_(4)/Fe_(3)O_(4)/MXene,when the ratio of Co_(3)O_(4)/Fe_(3)O_(4) added is 25%,has the highest RL value in 14.9 GHz band,the thickness is 8.5 mm thick,the best RL val⁃ue reaches-49 dB,and the EAB is 1.1 GHz.The composite of magnetic material and MXene with laminate structure is ex⁃pected to be one of the excellent one of the candidate materials for absorbers.

关 键 词：二维材料 MXene Fe_(3)O_(4) 铁氧体 静电自组装 

分 类 号：TB34[一般工业技术—材料科学与工程]