Enhanced microwave absorption and suppressed reflection of polypyrrole-cobalt ferrite-graphene nanocomposite in X-band
Polypyrrole-cobalt ferrite-graphene (PCG) nanocomposites have been synthesized by in-situ chemical oxidative polymerization. The effect of graphene loading in nanocomposite on shielding effectiveness, dielectric permittivity, magnetic permeability, ac conductivity and skin depth has been studied in...
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Published in: | Journal of alloys and compounds 2019-08, Vol.797, p.1190-1197 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Polypyrrole-cobalt ferrite-graphene (PCG) nanocomposites have been synthesized by in-situ chemical oxidative polymerization. The effect of graphene loading in nanocomposite on shielding effectiveness, dielectric permittivity, magnetic permeability, ac conductivity and skin depth has been studied in X-band (8.2–12.4 GHz). PCG nanocomposite shows highest shielding effectiveness by absorption ∼ 37 dB and least reflection < 1 dB. Enhanced microwave absorption in nanocomposite is attributed to increased dielectric loss due to increase in interfacial polarization and formation of conducting network in composite. Mechanism of shielding effectiveness by various processes i.e. reflection, absorption, multiple reflections etc. is also illustrated. Substantially, enhanced absorption and decreased reflection may be useful in defence for stealth technology in aerospace and, for internal application in cavity for reducing the internal oscillations.
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•Polypyrrole-cobalt ferrite-graphene (PCG) is synthesized by in-situ polymerization.•PCG nanocomposite exhibits excellent microwave absorption of ∼37 dB along with strongly reduced reflection of |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2019.05.176 |