摘要
通过原位刻蚀工艺获得MXene(Ti_(3)C_(2)T_(x)),然后采用水热法在其表面均匀生长Fe_(3)O_(4)纳米颗粒,从而获得磁性MXene。介电损耗机制分析表明,内在的介电弛豫现象主要是由缺陷、官能团和界面三种类型的极化弛豫引起。磁损耗分析表明,磁损耗主要是由自然铁磁共振和交换共振引起的。磁性MXene样品表现出优异的电磁波吸收性能。特别是Fe_(3)O_(4)与MXene的质量比为4:31的样品,在厚度为2.05 mm下,最小反射损耗达到−71.22 dB,对应的吸收带宽达到4.76 GHz。进一步增大Fe_(3)O_(4)含量,吸波性能反而有所下降。这可能是由于过量的Fe_(3)O_(4)破坏了材料内部的导电网络,致使整体的电磁波衰减性能下降。
MXene(Ti_(3)C_(2)T_(x))was obtained through in-situ etching process,and then Fe_(3)O_(4)nanoparticles were uniformly grown on the surface of MXene using hydrothermal method to obtain magnetic MXene.The analysis of the loss mechanism indicates that the intrinsic dielectric relaxation phenomenon is mainly caused by three types of polarization relaxation:defects,functional groups,and interfaces.Magnetic loss analysis shows that magnetic loss is mainly caused by natural ferromagnetic resonance and exchange resonance.Magnetic MXene samples exhibit excellent electromagnetic wave absorption performance.Especially for sample with a mass ratio of Fe_(3)O_(4)to MXene of 4:31,with a thickness of 2.05 mm,the minimum reflection loss reaches−71.22 dB,and the corresponding electromagnetic wave absorption bandwidth reaches 4.76 GHz.Further increasing the Fe_(3)O_(4)content actually leads to a decrease in absorption performance.This may be due to the increase in Fe_(3)O_(4)content disrupting the conductive network inside the material,resulting in a decrease in the overall electromagnetic wave attenuation performance.
作者
王皓
刘子义
周青青
何朋
WANG Hao;LIU Zi-yi;ZHOU Qing-qing;HE Peng(School of Material Science and Engineering,Anhui Polytechnic University,Wuhu 241000,China)
出处
《磁性材料及器件》
2025年第2期31-36,共6页
Journal of Magnetic Materials and Devices
基金
2022年安徽省大学生创新创业训练计划一般项目(S202210363178)。
关键词
MXene
水热法
吸波性能
电磁参数
MXene
solvothermal method
electromagnetic wave absorption
electromagnetic parameters
