Microwave absorption efficiency of poly (vinyl-butyral)/Ultra-thin nickel coated fly ash cenosphere composite

Angappan, M and Bora, PJ and Vinoy, KJ and Kishore, . and Vijayaraju, K and Ramamurthy, PC (2020) Microwave absorption efficiency of poly (vinyl-butyral)/Ultra-thin nickel coated fly ash cenosphere composite. In: Surfaces and Interfaces, 19 .

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Abstract

The demand for light weight broadband microwave absorber is ever increasing for defence and civilian applications. A hollow microsphere filler based polymer composite system was studied in the present work owing to its attractive microwave absorbing characteristics. Poly (vinyl-butyral) (PVB) is chosen as the matrix and flyash cenosphere (FAC) is used as filler (hollow microsphere). FAC, being dielectric, is coated with Ni-P using electroless coating method to synthesize core-shell filler(magneto-dielectric). The dielectrics and microwave absorption study was carried out for the frequency range 8.2�18 GHz (X-band and Ku-Band). The minimum reflection loss (RL) was obtained to be �69 dB (thickness 1.5 mm) for ~ 665 nm Ni coated FAC-PVB composite. Further, this composite has excellent microwave absorption efficiency (70 dB GHz/mm). Hence, an ultra-thin Ni coated FAC loaded PVB composite is a potential candidate for broad band microwave absorption. © 2020 Elsevier B.V.

Item Type:	Journal Article
Publication:	Surfaces and Interfaces
Publisher:	Elsevier
Additional Information:	copyright for this article belongs to Elsevier
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	02 Jul 2020 09:18
Last Modified:	02 Jul 2020 09:18
URI:	http://eprints.iisc.ac.in/id/eprint/65174

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