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Lightweight Microwave Absorber from Industrial Waste Fly Ash Cenosphere

Bora, Pritom J and Vinoy, K J and Kishore, Kishore and Ramamurthy, Praveen C and Madras, Giridhar (2016) Lightweight Microwave Absorber from Industrial Waste Fly Ash Cenosphere. In: International Conference on Emerging Trends and Advances in Electrical Engineering and Renewable Energy (ETAEERE), DEC 17-18, 2016, INDIA, pp. 459-466. (Unpublished)

Full text not available from this repository.
Official URL: https://doi.org/10.1007/978-981-10-4286-7_45

Abstract

The present investigation demonstrates the microwave absorption property of magnetic alloy nanoparticle-coated solid industrial waste fly ash cenosphere (FAC). Here, cobalt iron (CoFe) alloy nanoparticles were chemically coated over FAC, and a composite matrix was made from these particles using epoxy resin. Surface morphology of both CoFe-FAC and epoxy/CoFe-FAC composites was studied. The dielectric loss and reflection loss (RL) of this polymer composite were studied by rectangular waveguide transmission line method. A 10 wt% CoFe-FAC-loaded epoxy composite shows an excellent microwave absorption property in the X-band (8.2-12.4 GHz). The most effective RL value -29 dB was obtained for epoxy/ CoFe-FAC composite, whereas a pristine epoxy/FAC composite combination exhibits -12 dB RL under same condition. The thickness dependency of RL was also studied, and it indicates that the standard -10 dB RL can be obtained for epoxy/CoFe-FAC composite at a minimum thickness of 2 mm. The enhancement of dielectric loss, EM attenuation constant and loss factor with frequency was found to be responsible for the obtained RL.

Item Type: Conference Paper
Additional Information: Copyright for this article belongs to Springer.
Keywords: Fly ash cenosphere (FAC);Polymer composite;Reflection loss (RL);Dielectric loss; Loss factor
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Division of Interdisciplinary Research > Interdisciplinary Centre for Water Research
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 12 Jan 2019 10:39
Last Modified: 12 Jan 2019 10:39
URI: http://eprints.iisc.ac.in/id/eprint/61262

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