PDMS-Ni coated flyash cenosphere composite for broadband microwave absorption

Angappan, M and Bora, PJ and Hs, MJ and Kj, V and Kishore, B and Ramamurthy, PC and Vijayaraju, K (2018) PDMS-Ni coated flyash cenosphere composite for broadband microwave absorption. In: 4th Kishore Indian Institute of Science, Department of Materials EngineeringIEEE International Conference on Emerging Electronics, ICEE 2018, 17-19 December 2018, Bengaluru.

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Abstract

In search of novel light weight broadband microwave absorber for defense and civilian applications, industrial waste hollow microsphere (fly ash cenosphere or FAC) filler based polymer composite system was studied in the present work owing to its attractive microwave absorbing characteristics. PDMS is chosen as the matrix. FAC, being dielectric, is coated with Ni using standard 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 -43 dB with an excellent bandwidth. Hence, an ultra-thin Ni coated FAC loaded PDMS can be considered as a smart candidate for broad band microwave absorption.

Item Type:	Conference Paper
Publication:	2018 4th IEEE International Conference on Emerging Electronics, ICEE 2018
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Ashes; Dielectric materials; Filled polymers; Fillers; Fly ash; Microchannels, Electroless coating; Electroless Ni; Hollow microsphere; Magneto-dielectrics; Microwave absorbers; Microwave absorbing; Microwave absorption; Polymer composite, Microwaves
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:	30 Jul 2022 05:02
Last Modified:	30 Jul 2022 05:02
URI:	https://eprints.iisc.ac.in/id/eprint/75085

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