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Optical and electromagnetic absorption features of hierarchical pampon and cauliflower-like magneto/dielectric composite based absorber for C and X bands application

Huang, P ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2022.02.177
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. Hydrothermal and in-situ polymerization methods were used to successfully fabricate a pompon flower-like CoGd0.5Fe1.5O4 (CG) as a magnetic component and a cauliflower-like poly(indole-co-Py) (PP) co-polymer as a dielectric component for microwave absorption. The physico-chemical properties of CG/PP samples were determined via XPS, XRD, FTIR, BET, UV–vis, EDS, and FESEM analysis. VNA and VSM were used to evaluate the dielectric and electromagnetic properties of the CG and PP samples. The results of the absorption capability tests revealed that bi-layer samples outperformed single layer samples in terms of microwave dissipation capability. The thickness and arrangement of each layer in bilayer absorber effectively adjusted via MATLAB simulation. As a consequence, the effective absorption bandwidth in the bilayer absorber has been increased and covers the C and X bands entirely with a thickness of only 2 mm, in which 1 mm of CG composite layer with 1 mm of thickness is placed as an absorbing layer and a PP composite layer with 1 mm of thickness is considered as a matching layer. The hierarchical structure of both components (pompon and cauliflower-like morphology) may increase interfacial polarization, relaxation loss, and consequently attenuation constant of the absorber as well as improve impedance matching characteristics and decrease in density. Synergistic effects between two distinct layers containing magnetic and dielectric components may further increase the absorption feature. © 2022 Elsevier Ltd and Techna Group S.r.l
  6. Keywords:
  7. CoGd0.5Fe1.5O4 ; Bismuth compounds ; Chemical analysis ; Gadolinium compounds ; Iron compounds ; MATLAB ; Zinc compounds ; Absorption features ; Bi-layer ; Bi-layer absorber ; C-bands ; Hierarchical particle ; Magnetic components ; Poly(indole-co-py) polymer ; VNA ; X bands ; Polycyclic aromatic hydrocarbons
  8. Source: Ceramics International ; Volume 48, Issue 11 , 2022 , Pages 16280-16289 ; 02728842 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0272884222005958