Substituted nickel ferrite coated MWCNT/PVDF based epoxy nanocomposite for microwave absorption

Salim H. Siddiki, Sukanta Das, Kartikey Verma, Love Dashairya, Sushrut Das, Vijay Kumar Thakur, G. C. Nayak*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Metal-substituted spinel ferrite-based microwave absorbing materials (MAMs) are attracting significant attention due to their varied soft magnetic behaviour, and ease of synthesis. This work established the efficiency of Cd2+ substituted nickel ferrite coated MWCNT (with varied MWCNT loading) for X-band microwave absorption, in the presence of PVDF. The substituted ferrite was prepared with a facile solvothermal process. X-ray diffraction and vibrating sample magnetometer analysis confirmed the spinel structure of substituted ferrites and tuned magnetic behaviour of Cd2+ substituted ferrite structure, respectively. FESEM revealed a uniform coating of substituted ferrite on MWCNT and XPS confirmed Cd2+ substitution. Hybrid nanocomposites of ferrite coated MWCNT with PVDF, in the epoxy matrix, revealed superior microwave absorption for NiF-150_10 PV and CdNiF-150_10 PV with an absorber thickness of 3 mm in the X band. The absorption bandwidth with the RL below −10 dB reached 3.9 GHz and 3.6 GHz for NiF-150_10 PV and CdNiF-150_10 PV, respectively. The microwave absorption mechanism was discussed in detail. The developed NiF-150_10 PV and CdNiF-150_10 PV composites can be used as lightweight, low thickness microwave absorbers in the defense and telecommunication industries.

Original languageEnglish
JournalCeramics International
Early online date2 Jul 2022
DOIs
Publication statusFirst published - 2 Jul 2022

Bibliographical note

Publisher Copyright: © 2022

Keywords

  • Cadmium substituted nickel ferrite
  • CNT
  • Microwave absorbing materials
  • PVDF
  • Solvothermal method

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