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Synergistic effect of polyindole decoration on bismuth neodymium ferrite powder for achieving wideband microwave absorber

Wei, Y ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2022.05.159
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. Recently, composite materials with outstanding absorption properties, like extraordinary absorbing capability, light weight, and thin in size, are required to solve the challenges of electromagnetic pollution. In addition, most of the work is based on the optimization of absorber material structure, and microstructure. In the current work, we improved the reflection loss feature of Bi0.5Nd0.5FeO3 nanopowders via decoration with polyindole polymer by tuning the filler loading of the nanocomposite in the matrix. XRD, UV–Vis, XPS, and FESEM were used to determine the physicochemical features of the as-prepared nanocomposite. The minimum RL was lowered further with the increasing filler loading at 25 wt%. The lower RL of −22 dB was noticed for 2.2 mm thickness at 11.5 GHz. The maximum value of the SER for a 25 wt% sample was 5.5, whereas 19 dB and 24.5 dB values were recorded for SEA and SET, respectively. The resonance peak above 11.5 GHz demonstrated the better outcome of the absorber at high frequency. Good impedance matching characteristics, conductive features, dielectrics, and magnetic losses were all credited with the excellent reflection loss and electromagnetic interference shielding efficiency. The as-prepared nanocomposite materials that have been proven are interesting prospects for electromagnetic reflection loss and interference shielding that is lightweight, flexible, and extremely effective. © 2022 Elsevier Ltd and Techna Group S.r.l
  6. Keywords:
  7. Polyindole ; Bismuth ; Bismuth compounds ; Electromagnetic pulse ; Electromagnetic shielding ; Ferrite ; Filled polymers ; Fillers ; Iron compounds ; Neodymium ; Neodymium alloys ; Neodymium compounds ; Pollution ; Polymer matrix composites ; Bismuth neodymium ferrite ; Ferrite powders ; Filler loading ; Interference shielding ; Microwave absorbers ; Microwave absorption ; Polyindoles ; Reflection loss ; Synergistic effect ; Wideband microwaves ; Nanocomposites
  8. Source: Ceramics International ; Volume 48, Issue 17 , 2022 , Pages 25049-25055 ; 02728842 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0272884222017308