张猛   

张猛,副教授,硕士生导师,“泰山学者”团队核心成员。江苏省“科技副总”、青岛市十二届青年科技奖、青岛科技大学“科研新秀”、中国晶体学会会员、材料研究学会专业会员、中国化工学会高级会员、全国材料与器件科学家智库磁性材料与器件专家委员会常务委员、中国仪器仪表学会仪表功能材料分会电子元器件关键材料与技术专业委员会委员、国家自然科学基金/山东省自然科学基金/青岛市高新技术企业评审专家、SCI期刊《Frontiers ...Detials

An Equivalent Substitute Strategy for Constructing 3D Ordered Porous Carbon Foams and Their Electromagnetic Attenuation Mechanism

Release time:2023-10-19  Hits:

  • Key Words:MICROWAVE-ABSORPTION; NANOPARTICLES; MORPHOLOGY; AEROGEL; PANI
  • Abstract:Three-dimensional (3D) ordered porous carbon is generally believed to be a promising electromagnetic wave (EMW) absorbing material. However, most research works targeted performance improvement of 3D ordered porous carbon, and the specific attenuation mechanism is still ambiguous. Therefore, in this work, a novel ultra-light egg-derived porous carbon foam (EDCF) structure has been successfully constructed by a simple carbonization combined with the silica microsphere template-etching process. Based on an equivalent substitute strategy, the influence of pore volume and specific surface area on the electromagnetic parameters and EMW absorption properties of the EDCF products was confirmed respectively by adjusting the addition content and diameter of silica microspheres. As a primary attenuation mode, the dielectric loss originates from the comprehensive effect of conduction loss and polarization loss in S-band and C band, and the value is dominated by polarization loss in X band and Ku band, which is obviously greater than that of conduction loss. Furthermore, in all samples, the largest effective absorption bandwidth of EDCF-3 is 7.12 GHz under the thickness of 2.13 mm with the filling content of approximately 5 wt%, covering the whole Ku band. Mean while, the EDCF-7 sample with optimized pore volume and specific surface area achieves minimum reflection loss (RLmin) of- 58.08 dB at 16.86 GHz while the thickness is 1.27 mm. The outstanding research results not only provide a novel insight into enhancement of EMW absorption properties but also clarify the dominant dissipation mechanism for the porous carbon-based absorber from the perspective of objective experiments.
  • Volume:14
  • Issue:1
  • Translation or Not:no