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
Pages (from-to)30260-30271
Number of pages12
JournalCeramics International
Volume48
Issue number20
Early online date2 Jul 2022
DOIs
Publication statusPrint publication - 15 Oct 2022

Bibliographical note

Publisher Copyright: © 2022

Keywords

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

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